Michael Brown was 44 and living in the Century Townhomes in Clairton, Pennsylvania, when he was found shot to death in his home on Washington Avenue in late December 2015. Family members returning from a Christmas trip discovered his body on a Sunday afternoon; they had last seen him alive on Christmas Eve morning. Investigators believe he may have been dead for nearly a week before being found, and there were no signs of forced entry at the residence.

The Allegheny County Medical Examiner’s Office identified Brown, and police opened a criminal investigation into the multiple gunshot wounds. In the days after the discovery, authorities reported no immediate suspects and no publicly announced arrests. The motive and circumstances that led to his killing remain unclear.

If anyone knew Michael, his routines, or noticed unusual activity around the Century Townhomes that holiday week, please share what you know with investigators.