(ST. LOUIS, AP) — St. Louis police are publicly identifying the man they say shot and killed a woman before fatally turning the gun on himself.

Investigators say Vincent Perry shot Chimera Mayo before her body was found about 7 p.m. Sunday in a St. Louis home. Perry was found there unresponsive, and he later died at a hospital.

Mayo and Perry were 24.

Authorities believe the two were in a relationship and argued, leading to the fatal shootings.

The woman’s death marked the 169th homicide in St. Louis this year. There were 159 killings in all of 2014.