Police arrested Norman Polk at Anacostia Metro station.

D.C. Police officers shot and killed a man in Southeast D.C. at about 1:30 p.m. this afternoon. Police were responding to what appears to be a strange 911 call to 1767 Trenton Place SE, not far from the Southern Ave. Metro station, when the shooting occurred. A man reportedly called 911 to say that he had “killed and cut up” his sister, and when officers arrived on Trenton Place SE, they found a man armed…