Delonta Lavale Martin was 22 when he was shot and killed on July 20, 2014, in the 4700 block of Minnesota Avenue NE in Washington, D.C. He was found with gunshot wounds at about 9:40 p.m. on a summer evening in a neighborhood that had been experiencing violence.

Details about what led to the shooting are limited. The Metropolitan Police Department identified Martin as the victim and investigators say the probe has been hampered by a lack of eyewitnesses and surveillance footage. A reward of up to $25,000 has been offered for information leading to an arrest and conviction, but the case has stalled for want of new leads and reluctant witnesses.

Martin’s family continues to seek justice and closure. If anyone saw or heard anything in the area that night or has information that could help, please come forward to the Metropolitan Police Department.