Stockton and Modesto Men Indicted in Separate Felon in Possession Firearm Cases

SACRAMENTO, Calif. - U.S. Attorney Eric Grant announces the separate indictments of a Stockton man and a Modesto man that highlight the Office's commitment to prosecuting felons who unlawfully possess firearms and to reducing gun violence in the Eastern District of California.

Man with prior manslaughter conviction charged for illegal firearm possession

George Onesavanh, 43, of Stockton, was charged with being a felon in possession of a firearm. According to court documents, on April 27, 2026, Onesavanh was found in possession of a gun in Stockton. Onesavanh is prohibited from possessing firearms because of prior felony convictions that include voluntary manslaughter and carrying a concealed weapon.

The Stockton Police Department and the Bureau of Alcohol, Tobacco, Firearms and Explosives conducted the investigation.

Multiple Instagram posts lead to arrest

Samian Sivansay, 27, of Modesto, was charged with being a felon in possession of firearms after posting photos and videos of guns on Instagram on June 14 and 16, 2026. According to court documents, law enforcement tracked Sivansay's vehicle from Arizona to California, attempted a traffic stop, and briefly pursued him in a high-speed chase before ending the pursuit for safety reasons. Soon after, officers found the vehicle abandoned and recovered nine firearms inside, many matching those shown on Sivansay's Instagram. Sivansay is prohibited from possessing firearms because of prior felony convictions that include robbery with a firearm and being a felon in possession of a firearm.

The Bureau of Alcohol, Tobacco, Firearms and Explosives, the Stockton Police Department, the Stanislaus County Sheriff, and the California Highway Patrol conducted the investigation.

Assistant U.S. Attorney Nicole M. Vanek is prosecuting both cases.

If convicted, the defendants face a maximum statutory penalty of 15 years in prison and a $250,000 fine. Any sentence, however, would be determined at the discretion of the court after consideration of any applicable statutory factors and the federal Sentencing Guidelines, which take into account a number of variables. The charges are only allegations; the defendants are presumed innocent until and unless proven guilty beyond a reasonable doubt.

This case is part of Operation Take Back America, a nationwide initiative that marshals the full resources of the Department of Justice to repel the invasion of illegal immigration, achieve the total elimination of cartels and transnational criminal organizations, and protect our communities from the perpetrators of violent crime.