Mark Ruff, a 59-year-old U.S. Army veteran, was shot and killed inside his apartment on the 9400 block of East Roosevelt Boulevard in Philadelphia on January 22, 2021. He was found unresponsive with a gunshot wound and was pronounced dead at the scene. His girlfriend, 43-year-old Nicole Newell, was also found shot and killed in the same apartment.

Investigators say the suspect, 36-year-old Donald Tillman, had been on probation for firearms violations and allegedly murdered his wife, 33-year-old Tyronda Herrington, earlier that day before going to Ruff’s apartment. Ballistic evidence reportedly linked the same handgun to both crime scenes, surveillance footage showed Tillman wearing Ruff’s U.S. Army jacket, and Tillman’s cell phone was recovered at the apartment. Tillman was later arrested and charged with multiple offenses, including murder and burglary.

Ruff was described as active in the neighborhood, and his death, along with Newell’s, deeply affected the community. If anyone knew Mark Ruff or saw anything related to these incidents on January 22, 2021, please share information with investigators.