On the afternoon of Sunday, January 19, 2014, Richard Muller, 22, and his mother, Donna Muller, 49, were found shot to death in their Lawncrest home on Stevens Street. Both had sustained gunshot wounds to the head described by police as execution-style; Richard was discovered in his bedroom and Donna in an upstairs hallway by Richard’s sister, who had been away the night before.

Richard had recently earned an associate’s degree in systems and technology from Manor College, worked part-time as a cook at a nursing home, and planned to attend Temple University. Investigators reported no signs of forced entry, nothing taken from the house, and the family dog unharmed, leading them to believe the victims likely knew their attacker.

Despite public appeals and a city reward, no arrests or public identifications of suspects had been made and the double homicide remained unsolved. Does anyone with knowledge of the Lawncrest neighborhood or the Muller family have information that could help the investigation?