Police investigate deadly shooting in central Topeka

Candles light the arm patch of a Topeka police officer during a vigil at the law enforcement center in Topeka, Kan., Monday, Dec. 17, 2012. A man with a history of theft and weapons convictions gunned down two police officers investigating possible drug activity in a Kansas grocery parking lot, and was later killed after an armed standoff, authorities said Monday. (AP Photo/Orlin Wagner)