The Quincy Police Department is actively searching for Stephen J. Mosley, 36, of Quincy, in connection with a triple homicide that occurred early this morning in the 800 block of North 6th Street. Detectives have obtained an arrest warrant charging Mosley with three counts of First-Degree Murder.
Mosley is described as a Black male, 6’1’’, 260 lbs, and should be considered armed and extremely dangerous. Police are urging the public not to approach or attempt to confront him. Anyone with information about Mosley’s location is asked to contact the Quincy Police Department at 217‑228‑4470 or Quincy Regional Crime Stoppers at 217‑228‑4474.
Officials stated that the charges are based on probable cause, and Mosley is presumed innocent unless proven guilty in a court of law. Law enforcement is working around the clock to locate and apprehend the suspect while securing the surrounding community.
Residents in Quincy are being advised to remain vigilant, avoid the area around North 6th Street, and report any suspicious activity to authorities immediately. The department has not yet released details about the victims, citing the ongoing investigation.
This remains an active investigation, and updates will be provided as more information becomes available.

