On the night of August 23, 2025, 56-year-old Matthew Erik Simmerman was shot and killed in Tucson, Arizona. Police were called at about 11:45 p.m. to the 900 block of South Warren Avenue and found Simmerman in a nearby wash with gunshot wounds. Responding officers and Tucson Fire Department medics performed life-saving measures, but he was pronounced dead at the scene.

Detectives say Simmerman had been living in the wash with a female companion when an unknown person approached on foot and shot him. The motive was not immediately clear and the suspect initially fled. Investigators processed the area for evidence and asked the public for information.

Authorities later identified 40-year-old Joshua Poe as the primary suspect and charged him with first-degree murder. DNA evidence is reported to have linked Poe to Simmerman’s death; Poe was already in Pima County Jail on an unrelated homicide matter when he became a suspect in this case.

If anyone has information about what happened in the wash near South Warren Avenue on the night of August 23, please share what you know.