The U.S. Marine Who Became the Mexican Mafia’s Most Dangerous Boss – HT
Two images. The first, a United States Marine in dress blues, pressed, earned, the kind of uniform that changes the temperature of a room, a courthouse, a funeral, a family dinner. The Marine Corps has a phrase for what it does to a man. We make Marines. They mean it literally. They take someone raw, someone young, and they build them from the ground up.
Discipline, hierarchy, loyalty, the willingness to hold a line when everything in your body is telling you to run. The willingness to issue an order and expect it to be followed. The second, a 12-year-old boy, South Pomona, California, running with the street gang called Pomona 12th Street. The gang has been around since the 1940s.
Let the park where they hang out was built with federal money, specifically to give kids like him somewhere to go other than the streets. He went to the streets anyway. Both of those images are the same man. He didn’t become one thing and then the other. The discipline was always there. The loyalty was always there.
The willingness to follow a chain of command, and eventually to build one, to run one, to enforce it, was always there. What changed was the institution he directed those things toward. This is a story about a man who spent most of his adult life inside federal prison, not as consequence, not as punishment, as a base of operations.
The Marine Corps has a word for what it trains into a soldier. Structure, endurance, the understanding at a cellular level and that hierarchy is not a cage. It is the thing that keeps a unit standing when everything around it is falling apart. He absorbed every one of those lessons. He graduated from that school.
He just took the education somewhere else. What he built with it from behind bars, from a prison cell for 40 years, will take the US government longer than most careers to prove in a courtroom. He wore the uniform of a United States Marine. He ran with a street gang called Pomona 12th Street. Both of those things are true, and they are about to collide in ways that will take the US government 40 years to untangle.
His name is Michael Lerma. They call him Pomona Mike. They also call him Big Mike. Nobody calls him anything to his face that he hasn’t approved. That’s not a joke. That’s just how this works. Like he grew up in Pomona, California, same streets, same neighborhoods, same corner of the San Gabriel Valley where Pomona 12th Street has claimed territory since before he was born.
He didn’t stay there. At some point in his late teens, Michael Lerma enlisted in the United States Marine Corps, the branch with the most demanding entrance standards in the American military, the branch that does not recruit you for what you already are. It recruits you for what it believes it can build. Lerma passed that process.
He wore that uniform. He was, by the Marines’ own assessment at the time of his enlistment, someone worth making. He committed murder at 18 years old while still enlisted. The Marine Corps discharged him. He went to prison. Years later, after the lawyers, after the hearings, after enough time had passed for the state of California to consider whether a man like him could be returned to the world, Lerma sat in front of a parole board and said something they put in the transcripts.
Myself personally, I’ll tell you, I was a big embarrassment to the Marine Corps. Let that land for a second. He said it to a parole board, meaning by the time those words came out of his mouth, he had already done enough to require one. He said it the way a man talks about an institution he still respects, like the Corps was the wrong party, like he was the mistake, not the system that made him.
Then he walked out and made the same choices again. The Marine Corps trained him to take orders and give them, to build structure inside chaos, to make men follow. He took every single one of those lessons. When he just applied them somewhere else. In 1979, Michael Lerma walked out of his first prison sentence.
He was in his early 20s. He had gone in as a man with a murder conviction and no plan. He came out with something different. He told a parole board later, years later, under oath, what happened when he got out. He said he heard from other inmates about drug dealing and fast money. He said, “That’s the path he chose.
” He said it plainly, like a man describing a left turn he took a long time ago and never reversed. That moment, 1979, Lerma choosing, is the real beginning of the empire. What followed was a climb, not fast, not dramatic, the way things get built inside a criminal hierarchy. It takes years before anyone outside the structure can see the shape of it.
He moved back through Pomona 12th Street and the gang he had grown up running with before the Marines, before prison. P12 had been around since the 1940s. By the time Lerma came back into their orbit, it had operated for decades under a structure that answered ultimately to something much older and much larger, La Eme, the Mexican Mafia, a prison gang that had been operating since 1957 and had long since extended its reach from the cells into the streets.
Lerma climbed through that structure, associate, enforcer, shot caller, then, at some point that the public record doesn’t fully date, he was voted in. In 1995, California prison officials classified Michael Lerma as a full member of the Mexican Mafia. They put it in his file. He appeared before parole boards and said otherwise.
Both things remained true simultaneously, the classification and the denial, and the system noted it. The system also let him continue. By February 2012, the federal record begins. That’s when prosecutors documented the start of his enterprise activity, collecting taxes from drug dealers across Pomona. 30% of drug proceeds flowing up the chain toward Lerma, month after month, year after year.
For more than eight years, that money moved. By the time the FBI had assembled its formal case against him, Lerma was in his early 60s, still collecting, still in prison, still running Pomona, 61 years old. The documented enterprise ran from February 2012 to June 2020. Eight years from inside federal custody. When it finally collapsed, when the arrests came and the trial ended and the sentences were handed down, the network Lerma had spent decades building was dismantled defendant by defendant, uh conviction by conviction.
Not a street gang, an organization, and the man who built it had been behind bars for most of his adult life. 69 years old. Before Lerma built the empire, the system had three chances to stop him. Three separate moments where an institution of the United States government touched his life and could have changed its trajectory.
Each time, it made things worse. The first chance was 1972. The federal government, under anti-poverty programs designed to reduce gang activity in underserved communities, allocated funds to build a park in South Pomona. The park was called Sharky’s Park, officially Madison Park. The idea was straightforward.
Give kids somewhere to go. Give them courts, open space, a reason to be somewhere other than the streets. The government poured federal dollars into that park, thus called it a youth program, and handed Pomona 12th Street a permanent address. That is where Michael Lerma grew up. That is the park where P12 operated.
The intervention created the infrastructure. They’ve got the nicest equipment on the block and nobody uses it. The second chance was the Marine Corps. Lerma enlisted. The Corps took him, assessed him, trained him, and spent years building into him the exact capabilities that would define his criminal career.
How to organize men, how to enforce discipline, how to construct a hierarchy that holds under pressure, how to give an order and make it stick. Then he committed murder. The Corps expelled him, handed him a criminal record, and put him into the justice system with no resources and a felony conviction. They trained him. Then they sent him into the world with nothing to apply that training to.
The third chance was the incarceration itself. The prison system is designed, at least officially, to rehabilitate, to take someone who has broken the law and return them to society as something other than a repeat offender. Lerma sat in front of a parole board years later and described what his first prison sentence actually did.
He said he learned from other inmates how to think and be a convict. He said it under oath. He said it like a man describing a curriculum, because that is what it was. The park built the community. The core built the skills. The prison built the network. And look, I’m not saying the system set him up on purpose.
But when you line up these three moments back to back, it stops looking like bad luck. Starts looking like a blueprint nobody meant to draw. This is not an accident. When you look at the trajectory, government money flowing into the neighborhood where P12 operated, military training given to someone the system then abandoned, a prison that functioned as graduate school for organized crime, what you see is a pattern, not a conspiracy, a pattern, the kind that repeats in American cities so often it stops looking like a failure and starts
looking like a feature. Three times the system had Michael Lerma in his hands. Three times it let him go with more skills than he came in with. The fourth time, it took 40 years of FBI work to put him away for good. For years, decades actually, Michael Lerma maintained two separate realities at the same time.
In the first reality, he was a man working his way through the system, a convict who had made mistakes, acknowledged them, expressed remorse. He sat in front of parole boards. He talked about the Marine Corps. He talked about where he went wrong. He performed, and he performed well enough that the hearings kept happening, that the process kept moving, that the question of his release stayed alive.
In the second reality, he was running Pomona. Both things were true simultaneously. The parole board saw the first reality. The streets of Pomona operated in the second, and there was no point at which those two realities touched, not officially, not in a way the record could prove for a very long time. In 1995, California prison officials put something in his file.
Four words, Mexican Mafia full member. They had assessed the evidence and reached a classification. It went into the official record. It stayed there. Lerma went before a parole board and said the opposite. The classification stood. The denial stood. Both things existed in the official record at the same time.
One document saying he was La Eme, another containing his own sworn words saying he was not. For 25 years, the system held both without resolving the contradiction. He wasn’t performing poorly. He was performing exactly well enough. The audience, the parole boards, the officials conducting reviews, saw what the performance was designed to show them, and the empire ran while they watched. Then the phones got tapped.
The kites got intercepted. The audience changed from parole boards to federal agents, and federal agents are not watching for remorse. They are watching for patterns. They found them. The performance didn’t end because he stopped performing. It ended because the wrong people started watching. Before we go any further, I want to stop on someone.
In the court documents, he appears as SB, two initials. That’s all the public record has released. No full name, no age, no photograph, just two letters and a case number. What we know, he was an inmate at MDC Los Angeles. He owed a drug debt. The amount is not specified in the court record. On the night of June 28th, 2020, three men entered his cell. They stabbed him.
They strangled him. He died. The order to kill him came from Michael Lerma, from inside a different federal facility, through a phone that wasn’t supposed to exist. That is the entire official account of SB’s death. Two initials, a method, and a reason that fit in one sentence. SB had a name. The federal court records identify him only by initials, but coroner records show he was Steve Bencom, known as Risky Business, a member of the King Cobras gang, who had been sentenced just days earlier to 10 years in federal prison
for methamphetamine trafficking. He was somebody’s son. And on June 28th, 2020, he died in a federal detention facility over a drug debt he couldn’t pay. Here is the thing about Michael Lerma that most coverage of this case misses. Prison wasn’t where he was punished. Prison was where he worked. Let me keep it real with you for a second.
When most people think about what it means to send someone to prison, they think removed, gone, off the streets, the threat contained behind walls and guards and razor wire. That is how the system is supposed to function. You put someone in, the damage stops, the network breaks down, the people left outside scatter.
That is not what happened with Lerma. From behind bars, from inside federal facilities, from cells in California state prisons, from rooms with locked doors, he ran an enterprise, not managed the remnants of one, not kept in loose contact, ran it actively, with structure, with a reporting chain, with a disciplinary system that had five levels and went all the way to murder.
He ran a criminal enterprise from inside a federal prison. For eight documented years, the money flowed in. The orders flowed out. Let that land for a second. The institution designed to remove him from the streets instead gave him a permanent address in a building full of people who were part of his network.
Every man La Eme placed in that facility was, in some sense, a resource. Every transfer brought new connections. The prison system moves people constantly between facilities, between housing units, between populations. For someone who understood how to work that system, every move was an opportunity. The 30% tax he collected from drug dealers in Pomona wasn’t collected at gunpoint, face-to-face, by a man walking the streets.
It was collected by a structure, a structure he had built and could operate from anywhere, including a federal cell. Other men go to prison and the empire collapses. Lerma went to prison and the empire expanded. That is the paradox. That is also the story. At his peak, Michael Lerma controlled two completely separate territories at the same time, from confinement, from a cell, uh simultaneously.
The first territory, Pomona, California, Los Angeles County, a city of 150,000 people, car washes, taco shops, corner stores, apartment complexes, streets that P12 had claimed for decades. Drug dealers operating in those streets paid 30% of their proceeds upward through the chain.
That money did not go to someone who walked the block and collected it face-to-face. It moved through a system Lerma had built to operate without him being present. Pomona was running. He wasn’t there. The second territory, Calipatria State Prison, Imperial County, California, roughly 135 miles southeast of Pomona, in the desert between the Salton Sea and the Mexican border, a level four maximum security facility, the highest classification in the California state system. Lerma held sway there, too.
A head La Eme’s shot-caller among the prison population, his authority extended through the inmate hierarchy inside Calipatria’s walls. The men there answered to the same structure as the men on Pomona’s streets. He was not in Pomona. He was not in Calipatria. He was in a third location, a separate federal facility, and he was running both.
Think about what that means operationally. You are in a locked building. You cannot leave. You have no phone, not an authorized one. You have no access to the internet. Every visitor is monitored. Every piece of mail is subject to review. And somehow, the money from a city 135 miles away is still moving toward you.
The discipline system in a prison you have never personally set foot in is still functioning on your authority, and no one outside the structure knows any of it. That is not gang leadership. That is management. That is the kind of reach that most legitimate organizations would struggle to maintain across two locations with full access to technology, travel, and communication.
He had none of that. He had the structure he built and the people who believed in it. One man, two prisons, one city. None of it visible to anyone didn’t already know where to look. The FBI spent eight years figuring out what the neighborhood had always known. Real quick, if you’re watching this and you haven’t subscribed yet, hit that button.
We cover stories like this one regularly and you don’t want the algorithm deciding whether you see them. Also, check the notification bell. It matters more than people think. Now, here’s how the machine actually worked. Cheryl Perez The machine had three layers. Each one was simple. That was the point. The money moved first.
In La Eme, certain women in the community hold a specific role. They are called senoras. The word means what it means. It is a title of respect, a rank. In practice, it means they are the financial arm of the organization on the outside. They collect, they hold, they move money. Cheryl Perez Castaneda was 63 years old. She was La Senora for Lerma’s operation.
Her job was to collect the drug taxation proceeds from dealers operating in Pomona, the 30% that flowed up the chain, and then deposit that money into Lerma’s prison commissary account at Pelican Bay State Prison. A commissary account is the most mundane thing in the American prison system. It is where inmates keep money to buy hygiene products, snacks, uh postage stamps.
Postage stamps. The man is running a criminal empire and somewhere in the accounting there are postage stamps. It is not designed to move tax proceeds from a criminal enterprise. It is not monitored the way a bank account would be. It is auditable only if investigators already know to look. The government handed Lerma a financial channel with no wire transfer records and no suspicious activity flags and he used it for years.
Not the murder, the stamps. Nobody caught it until the FBI already knew everything else. Then the orders had to move. Contraband phones existed inside the facility. This is not unique to Lerma’s case. Contraband phones are a documented problem across the American prison system. What Lerma had was a network that used them with discipline.
Orders moved out through phones and kites. You kites are handwritten notes passed through visitors, through mail, through institutional transfers, hand-to-hand inside the system. Instructions went out, money reports came back. The machine kept running. He also had a secretary. Not a senora. A 43-year-old woman from La Verne, California who handled the administrative and logistical side of the operation on the outside.
Facilitating an armed robbery, participating in the extortion network, moving the pieces the senora didn’t handle. She stood in a federal courtroom and told the judge, “I’ll help do anything I can.” Not past tense, present tense. “I will help.” That sentence, said in front of a federal judge, tells you more about Michael Lerma’s gravity than anything in the indictment.
And when the money stopped moving or the orders were ignored, someone had to pay. La Eme’s five-level system wasn’t a threat. It was a policy. Verbal warning, physical assault, targeted violence, forced transfer, murder. Every person in the network knew the levels. Every person knew what came after non-compliance.
There was no ambiguity, no negotiation. The framework existed so that Lerma didn’t have to be present to enforce it. The structure enforced itself. Lerma didn’t need to be on the street. He had a senora to move the money, a secretary to run logistics, and a phone that wasn’t supposed to exist. The machine didn’t need him present.
It needed him alive. To understand why the June 2020 murder was different from everything that came before it, you need to understand what happened in July 2013. Cheryl Perez Castaneda’s son was shot. That is the start of it. In retaliation, not after deliberation, and not after consulting anyone, she used the structure Lerma had built to go after the man she believed was responsible.
First, a carjacking attempt that turned into a shooting. The target survived. Then she solicited a murder order against the same man, an inmate at LA County Jail. The murder attempt also failed. Both operations, run through the La Eme enforcement infrastructure, targeted the same individual in the same month.
The FBI had the phone calls. They played them back. On the recording, Cheryl Perez Castaneda laughed when she was told the victim was still alive. Then she worked to put a green light on him, meaning a standing order that the next opportunity would be the final one. That is the culture. Personal grief, a mother’s grief, filtered through the La Eme enforcement infrastructure, turned into an institutional order they then laughed about on a recorded line when it came up short.
Lerma built an organization where even maternal instinct got processed through the five-level system. Now, June 28th, 2020, MDC Los Angeles, a federal detention facility, not a state prison, a federal facility under federal jurisdiction, monitored at a different level than any state system. An inmate known as SB owed a drug debt.
The amount is not in the public record. Lerma, from inside a different federal facility, issued a level five order. Carlos Gonzalez, Popeye, received it. So did Juan Sanchez, Squeaks, and Jose Valencia Gonzalez, Swifty. Three men, one cell, they entered. They carried out the order. He died. Here is what most of the reporting on this case left out.
The prosecution put it plainly in closing. Assistant US Attorney Kyle Cahan looked at the jury and said, “If Michael Lerma wills it, you will die.” Seven words, 40 years. This was not the first time Michael Lerma had been convicted of murder. It was the third. The first, age 18, the Marine Corps. He was in his 20s when he came out of that sentence.
The second, the details are sealed in the public record. He served that sentence. He came out of that one, too. And then, well into his 60s, from inside a federal detention facility, through a phone that wasn’t supposed to exist, he ordered a third murder. The parole board that reviewed his file had let him approach the question of release at least once before.
The system had seen him twice convicted of murder and still left open the door of parole consideration. He walked through those hearings and said what needed to be said and the empire continued. The third murder was different. MDC Los Angeles is a federal building with federal surveillance infrastructure.
Three co-defendants were now inside the system, each one a potential witness. The contraband phone generated records. The chain of command was traceable in a way it had never been before. He had ordered killings before and survived it. This time, every link in the evidentiary chain held. The 2020 MDC killing led to another federal murder conviction, adding to a violent history that already included prior murder convictions going back to when he was 18.
In between, 40 years of building something the government couldn’t see until it killed someone in a federal prison. Two times the system had already let him walk. The third time, he was in federal custody dead and he had finally given the FBI exactly what it needed. The murder at MDC Los Angeles gave investigators what years of surveillance had been building toward, a single act inside federal jurisdiction with a traceable chain of command, multiple witnesses, and physical evidence that didn’t disappear.
What came next was not fast. RICO cases don’t move fast. They are built in layers. Every defendant, every plea, every piece of phone data stacked on top of the last. The FBI San Gabriel Valley Safe Streets Task Force had been working the case. So had the LA County Sheriff’s Department, the Pomona Police Department, El Monte Police, the DEA.
Five agencies, years of work, and one murder that gave them the architecture they needed to bring the whole structure down at once. The first domino was Cheryl Perez Castaneda. Your October 2020 guilty plea, January 2021 sentence. 12 years in federal prison for RICO conspiracy and firearms charges.
La Senora, the woman who had moved Lerma’s money, relayed his orders, solicited a murder because her son was shot, and laughed on a recorded phone call when the target survived, took 12 years. Federal, no parole. The La Verne secretary, 43 years old. Her full name has not appeared prominently in most public reporting.
What appeared prominently was what she said in court. I’ll help do anything I can. Seven plus years in federal prison. Federal, no parole. Popeye, Squeaks, and Swifty, the three men who entered SB cell on June 28th, 2020, were arrested and charged as the direct perpetrators of the murder. Their cases moved through the federal system.
Each conviction added to the count. And by the time it was over, federal prosecutors had already secured multiple related convictions before the four life sentences came down in March 2026. Señoras, secretaries, enforcers, all of them processed through the same federal system Lerma had spent years learning to navigate.
The women who moved the money, the men who carried out the orders, every one of them convicted. Federal, no parole. The verdict came first. In March 2025, after a 20-day trial, a jury in Los Angeles federal court found all four men guilty. Racketeering conspiracy, violent crimes in aid of racketeering, and first-degree murder within federal jurisdiction. Then, the sentencing.
March 12th, 2026. United States District Court, Central District of California, the Honorable George H. Wu presiding. Four defendants, Michael Lerma, Carlos Gonzales, uh Popeye, Juan Sanchez, Squeaks, Jose Valencia Gonzales, Swifty, life, no parole. Life, no parole. Life, no parole. Life, no parole.
Judge Wu also ordered restitution. $10,365. That is what the court determined was recoverable in damages for the family of SB. A man killed in a federal prison over a drug debt by three men acting on the orders of a fourth who was running an empire from behind bars for over four decades.
That number should stay with you. In the sentencing memorandum, prosecutors described Lerma’s role in one sentence. His role as the leader of a violent criminal enterprise reflects the danger he remains to the community. Remains, present tense. At 69 years old in federal prison, sentenced to life, he still represents danger. That is the assessment of the people who spent years building the case against him.
He was 12 years old when he joined Pomona 12th Street. He was 18 when he committed his first murder and got expelled from the Marine Corps. He was 69 when Judge Wu sentenced him to spend the rest of his life inside a federal prison. He will not see the outside again. Michael Lerma, age 69, life in federal prison.
He will die there. The verdict didn’t end the story. It ended Michael Lerma’s chapter of it. Pomona 12th Street was not convicted. P12 still exists. The gang that operated under the structure Lerma helped to build is still in Pomona. The streets are still there. The economics that made the taxation system work in the first place, the drug market, the distribution networks, um the hierarchy of who owes [clears throat] what to whom, none of that was dismantled in the sentencing.
Sheryl Perez Castaneda is serving 12 years. Not life, 12 years. At some point she walks out. The La Verne secretary is serving seven plus years. At some point she walks out. The contraband phone network that carried Lerma’s orders from one federal facility to another exists in every federal facility in America.
It existed before 2020. It exists now. It will exist after. Michael Lerma did not build La Eme. He ran one node of it, the Pomona node, for four decades. The node was severed in 2026. La Eme is not severed. I’ve read every public document in this case, the sentencing memoranda, the parole transcripts, the press releases from the FBI and the US Attorney’s Office, the news coverage from the day the verdicts came down.
The one thing that does not appear anywhere in any of it is a word from Michael Lerma about SB. Not remorse, not justification, not even an acknowledgement that SB existed as a human being. Just a sentence. The case is closed. The empire is not. My honest read, the government got the man. They didn’t get the math.
Someone in Pomona right now is running the same calculations Lerma ran in 1979. The structure doesn’t need him. It never did. Go back to the two images. A United States Marine in dress blues. That uniform was surrendered at 18 years old when he committed a murder and the court threw him out. The discipline stayed. The hierarchy stayed.
The chain of command stayed. Just the uniform went. A boy running the streets of South Pomona with Pomona 12th Street. Those streets were surrendered officially in a federal courtroom at 69 years old when Judge Wu said, life, no parole. The structure stayed, the tax stayed, the system stayed, just the boss changed.
That is the part of this story that doesn’t end with the sentencing. Sharky’s Park is still there. The federal money that built it in 1972 still flows into communities like Pomona through programs designed to give kids somewhere to go. The same infrastructure, the same intention, the same results in city after city where the park becomes the territory and the territory becomes the empire.
Lerma is not the first, he is not the last. La Eme does not pause for a sentencing. The señora system doesn’t require Sheryl Perez Castaneda specifically. The contraband phone network doesn’t need one particular boss to keep running. The structure Lerma spent 40 years perfecting was designed to outlast him. That was the whole point of building it right. The machine is running.
It was running before Lerma took it over. It will be running after. The Marine Corps called him a big embarrassment. The Mexican Mafia called him a full member. History will call him one of the most effective criminal operators the RICO statute was ever used to stop. And Pomona 12th Street? Pomona 12th Street didn’t call him anything. They just kept paying.
Somewhere in Pomona right now, someone is collecting that tax. Michael Lerma taught them how. He taught them well. That’s the part life in prison can’t fix. If you made it this far, thank you. Subscribe if you haven’t. Share this with someone who needs to understand how systems like this actually work. We’ll be back with the next one.