On the evening of Sunday, February 19, 2012, 21-year-old Mohamed Hassan was shot and killed in Blackstone Square in Boston’s South End. Police say the sound of four gunshots was heard around 9:30 p.m.; when the scene cleared Hassan was found with a gunshot wound to the face and was pronounced dead at the scene. The Office of the Chief Medical Examiner ruled his death a homicide.

Hassan, also known as Hum Greazy or Humz, lived in the nearby Villa Victoria development and performed as a hip-hop artist. Friends described him as a peacemaker and everybody’s friend; his longtime girlfriend said he had been just drinking and chillin in the park before the shooting. Police told investigators the killing did not appear to be random, but the Boston Police Homicide Unit has made no arrest and no suspect has been publicly identified.

Anyone who knew Mohamed, his routines, or who was in Blackstone Square that night is asked to come forward with information.