On March 13, a federal grand jury returned four separate indictments against Brown Brotherhood Gang Members Leo Alphonzo Alonso-Medina, 32, of Vallejo; Jeremiah I’amafana Salanoa, 22, of Vallejo; Doroteo Suastegui, 47, of Vallejo; and Carlos Osvaldo Higuera-Aldana, 22, of Dixon, Acting U.S. Attorney Michele Beckwith announced.

According to court documents, the Brown Brotherhood gang is a subset of the Sureño gang and has been a frequent target of investigations of the Vallejo Police Department and the Solano County Violent Crime Task Force. The primary criminal activities of this gang have included murder, robbery, extortion, drug trafficking, firearms trafficking, burglary and stolen vehicles.

The current investigation began in February 2024 and led to searches and arrests on Feb. 27 of this year. FBI agents and task force officers arrested these four members of the Brown Brotherhood gang on that day for federal drug trafficking and firearms charges.

The indictment against Leo Alphonzo Alonso-Medina charges counts of distribution of cocaine and methamphetamine, unlawful dealing in firearms and two counts of being a felon in possession of a firearm. If convicted, Alonso-Medina faces a maximum statutory penalty of life in prison and a $10 million fine.

The indictment against Jeremiah I’amafana Salanoa charges three counts of distribution of fentanyl, one count of distribution of methamphetamine and possession with intent to distribute fentanyl. If convicted, Salanoa faces a maximum statutory penalty of life in prison and a $10 million fine.

The indictment against Doroteo Suastegui charges counts of distribution of methamphetamine, possession with intent to distribute cocaine, possession with intent to distribute methamphetamine and unlawful dealing in firearms. If convicted, Suastegui faces a maximum statutory penalty of life in prison and a $10 million fine.

Finally, the indictment against Carlos Osvaldo Higuera-Aldana charges three counts of distribution of methamphetamine, one count of possession with intent to distribute methamphetamine and one count of possession with intent to distribute fentanyl. If convicted, Higuera-Aldana faces a maximum statutory penalty of life in prison and a $10 million fine.

These cases are the product of investigations by the FBI Violent Crime Task Force, the Bureau of Alcohol, Tobacco, Firearms and Explosives, the Fairfield Police Department, the Vacaville Police Department, the Vallejo Police Department, the Solano County District Attorney’s Office and the Solano County Sheriff’s Office. Assistant U.S. Attorneys Jason Hitt, R. Alex Cárdenas and Adrian Kinsella are prosecuting these four federal cases.