Two Missouri Felons Sentenced on Gun Charges

ST. LOUIS - Two convicted felons who were caught with firearms and homemade silencers have been sentenced to prison.

U.S. District Judge John A. Ross on Friday sentenced Steven Matthew Dinzebach, 35, of Franklin County, Missouri to 72 months in prison. He will be on supervised release for three years after his release from prison.

U.S. District Judge Audrey G. Fleissig on Wednesday sentenced Bryan Daniel Flynn, 44, of Ballwin, to 75 months in prison. He will be on supervised release for two years after his release from prison.

Flynn pleaded guilty in April to one count of being a felon in possession of a firearm. He admitted being caught with 30 firearms, despite being a convicted felon who is barred from possessing guns. He also had homemade silencers, ballistic vests, stolen property and drugs.

St. Louis Metropolitan Police Department detectives conducted a court-approved search of Flynn's home in Ballwin on July 25, 2023, after learning that he was participating in a stolen property ring, his plea agreement says. Detectives found 4.48 grams of cocaine, .44 grams of methamphetamine and cocaine, 10 Diazepam tablets, one Alprazolam tablet and 300 grams of psilocybin. Flynn admitted being in possession of a Ford F250 stolen from Ranken Technical College, which was stored on his property near Troy, Missouri. Detectives found 27 firearms there, as well as homemade silencers, three large containers of firearm accessories, two large containers of ammunition, five ballistic vests and stolen property.

Flynn's cell phone led detectives to two storage units in Festus, Missouri that contained two more guns and ammunition. His boat, which was stored in a marina in St. Charles, contained another silencer, a drum magazine loaded with .22-caliber rounds and a large amount of ammunition. On Aug. 7, 2023, Flynn's assistant turned a 7.65mm Walther firearm into law enforcement, saying Flynn had asked her to hide it at a "cabin" in Ballwin.

Dinzebach pleaded guilty to one count of being a felon in possession of one of more firearms in May. He admitted being caught by investigators with a .22-caliber handgun equipped with a homemade silencer, a .380-caliber handgun and a large amount of ammunition. He also admitted selling firearms to Flynn after first doubling their purchase price. Dinzebach told investigators that he purchased guns from a website where people conducted private firearms sales. Two of the firearms seized from Flynn were traced to Dinzebach's wife as the purchaser.

The St. Louis Metropolitan Police Department and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) investigated the cases. Assistant U.S. Attorney Torrie Schneider prosecuted the cases.

"Instead of learning from their past, they chose to continue a life of crime and put our community at risk of potential gun violence," said Bernard G. Hansen, Special Agent in Charge, ATF Kansas City Field Division. "Today's sentencing demonstrates the outstanding partnership between ATF and the St. Louis Police Department as well as the commitment we share to work together in keeping firearms out of the hands of felons so that our streets are safer for everyone."

This case is part of Project Safe Neighborhoods (PSN), a program bringing together all levels of law enforcement and the communities they serve to reduce violent crime and gun violence, and to make our neighborhoods safer for everyone. On May 26, 2021, the Department launched a violent crime reduction strategy strengthening PSN based on these core principles: fostering trust and legitimacy in our communities, supporting community-based organizations that help prevent violence from occurring in the first place, setting focused and strategic enforcement priorities, and measuring the results.