Mario Ernesto Galo was 21 when he was shot and killed in Langley Park, Maryland, on June 13, 2010. Around 7:10 p.m. gunfire erupted in the 7900 block of Riggs Road; officers found Galo, a Riverdale resident, and 25-year-old Early Martinez of Langley Park both suffering from gunshot wounds. The two men died from their injuries.

The Prince George’s County Police Department Homicide Unit conducted an intensive investigation, canvassing the area and seeking witnesses. A graffiti shrine later appeared at the rear of a garden apartment complex near the scene. Authorities did not release information about suspects or leads, and as time passed the trail went cold.

The double homicide remains unsolved. Does anyone who lived in Langley Park at the time or who knew Mario or Early have information that could help investigators?