TOPEKA, Kan. - A man with a history of theft and weapons convictions gunned down two police officers investigating possible drug activity in a grocery parking lot, and was later killed after an armed standoff, authorities said Monday.

Killed Sunday night were Topeka Police Cpl. David Gogian, 50, and Officer Jeff Atherly, 29.

Kansas Bureau of Investigation official Kyle Smith identified the man who opened fire as David Tiscareno, 22, of Topeka.

Shawnee County Sheriff Herman Jones said Tiscareno was seated behind the driver's seat of a car stopped in the parking lot of a grocery store when police ordered the occupants to get out. After shooting two of the three responding officers, Tiscareno got back into the car and drove from the scene. The third officer returned fire, Jones said.

Authorities, based on a tip, found Tiscareno holed up early Monday at a house about a mile away. After negotiations broke down, Tiscareno emerged with a gun and was shot.