Mario L. Dunnville, 41, was found dead at 7020 East 21st Street on Indianapolis’ east side on September 13, 2012. Police from the Indianapolis Metropolitan Police Department treated the death as a homicide and opened a murder investigation at the residential scene near 21st Street and Shadeland Avenue.

From the start, details about how Dunnville was killed, a motive, or eyewitnesses were scarce. Investigators reported no immediate suspects, and the case was later entered into cold-case and unsolved-homicide databases; suspect information remains unknown and no arrests have been announced. Family and friends held funeral services on September 20, 2012, at Lavenia and Summers Home for Funerals, and he was buried at Sutherland Park Cemetery.

Anyone who knew Mario, was in that neighborhood on September 13, 2012, or has information that could help the investigation is asked to come forward.