St. Petersburg police say 21-year-old K’Mia Simmons was shot while her two young children and their father were in the car on Tuesday. TAMPA, Fla. — St Petersburg Police say they are still searching for the gunman who shot and killed a young mom while she was in a car with her children and their father, Tuesday. The shooting happened on 22nd Street South at 18th Avenue South around 6:15 p.m. Police say the mother, 21-year-old K'Mia Simmons, later died from her wounds.