Timothy Dickerson

Timothy Dickerson, 38, was shot and killed by his girlfriend during an argument at a home in unincorporated St. Louis County, police said. Porsche Moore, 37, was charged with second-degree murder and armed criminal action. Police said she shot Dickerson just before 10:30 p.m. Saturday in the 10500 block of Emerald Ridge Avenue, near Midland Boulevard and Ashby Road. Police said Dickerson was shot in the back. He was pronounced dead at the scene. Moore is being held on a $250,000 cash-only bond.