A former St. Louis County police officer admitted in federal court on Monday that he sexually assaulted 18 handcuffed men he had arrested, using his badge and patrol car to isolate victims before attacking them. Marcellis Blackwell pleaded guilty to 18 federal counts of deprivation of rights under color of law, 15 of which involved kidnapping, and now faces a recommended 30-year prison sentence when he is sentenced on November 24.
The federal counts mark a significant escalation from an earlier state court proceeding, in which, according to the St. Louis Post-Dispatch, Blackwell pleaded guilty to charges connected to just one victim while prosecutors dismissed more than a dozen other state charges and recommended a 20-year sentence. The federal case, filed under 18 U.S.C. § 242, carries far steeper exposure — the statute allows penalties up to life imprisonment when offenses involve kidnapping or aggravated sexual abuse, according to CaseMine. Blackwell had been set to stand trial later this month before instead entering the federal guilty plea, per the Post-Dispatch's reporting.
Federal prosecutors say the assaults took place during Blackwell's roughly one-year tenure with the North County Police Cooperative, a consolidated agency created in 2015 to provide shared policing across 10 small municipalities in northern St. Louis County. The cooperative employs approximately 60 commissioned officers, according to KSDK.
A Pattern of Covering His Tracks
According to the U.S. Department of Justice, Blackwell routinely deactivated his body-worn camera before driving victims to secluded locations, including Normandy High School and the rear parking lot of his own department, then falsified police reports on 13 occasions claiming the camera had been recording the whole time. The Post-Dispatch reported that each victim was arrested before Blackwell allegedly assaulted them inside his patrol car.
Investigators also found videos of the assaults saved on Blackwell's personal devices, along with images covertly taken of people in public restrooms and small elevators, the Post-Dispatch reported. Federal prosecutors disclosed during a November 2023 detention hearing, as reported by AP News, that Blackwell also kept photos of roughly 120 personal driver's licenses and Normandy High School student IDs on his phone alongside those covert recordings.
How the Case Came to Light
The federal investigation began on June 4, 2023, after a victim contacted the North County Police Cooperative to report an assault that had happened the day before, prompting local authorities to refer the case to the FBI as additional victims came forward, per the Justice Department. Following a 36-count superseding indictment in January 2024, FBI St. Louis set up a dedicated public hotline to solicit further victims, noting that Blackwell had deliberately targeted people he believed were unlikely to report police abuse.
Civil Suit Names Police Chief, Cooperative
Beyond the criminal case, a former detainee filed a federal civil rights lawsuit in February 2024 against Blackwell, Chief John Buchanan, and the North County Police Cooperative, alleging Blackwell unlawfully detained him in Wellston in November 2022 and sexually abused him during transport, according to court filings obtained through GovInfo. That lawsuit tests whether the multi-jurisdictional cooperative and its leadership bear supervisory liability for an officer's conduct.
Court records and investigative reporting also revealed that Blackwell previously went by the name Willis Green Overstreet III and had been sued for insurance fraud in Illinois and subjected to wage garnishment in Indiana before he was ever hired as a police officer, according to Gateway Journalism Review. That outlet also reported that Missouri statutory provisions mandate the closure of police decertification records, which prevents public disclosure of a decertified officer's former commissioning agencies during cross-jurisdictional hiring — a gap that has fueled ongoing debate over how thoroughly departments vet new hires before putting them on patrol.
