Keyot Marks, 35, was shot in the head and killed in Philadelphia’s Strawberry Mansion neighborhood in the early morning of November 30, 2014. Police responded just after 2:30 a.m. to calls on Edgely Street near 29th and paramedics pronounced Marks, a Mayfair resident, dead at the scene.

Investigators had not identified any suspects or determined a motive at the time, and the Philadelphia Police Department continues to list the case as an open, unsolved homicide. Marks had prior criminal history: court records show a 2003 conviction for voluntary manslaughter in a July 2001 killing, with a sentence of seven to 14 years and paroles granted in February 2009 and September 2012 following a 2011 parole violation. Authorities did not state whether that past conviction was connected to his death.

If anyone has information about what happened on Edgely Street that night, please share what you know with the Philadelphia Police Department.