Gerardo Astacio-Leon, 48, was fatally shot inside his Theodore Street home in the Eastwick neighborhood of Philadelphia on the evening of January 16, 2015. Police were called shortly before 6 p.m.; officers found him with a gunshot wound to the chest and he was taken to the Hospital of the University of Pennsylvania, where he was pronounced dead a short time later.

Initial investigators considered a possible home invasion, but detectives later concluded the shooting followed an argument that escalated into violence. The details that led to the dispute and the precise nature of the relationship between Astacio-Leon and the man who shot him have not been disclosed. A few days after the homicide, authorities arrested 32-year-old Raheem Jones of the Olney section of Philadelphia and charged him with murder and related offenses.

Does anyone have information about what happened that night or about the relationship between Astacio-Leon and the charged suspect?