By JUAN A. LOZANO Associated Press Authorities in the Houston area are searching for a 21-year-old man who they say struck and killed a police officer while fleeing a traffic stop. Harris County authorities say a warrant for felony murder has been issued for Tavores Henderson. Police say Henderson struck and killed Nassau Bay police Sgt. Kaila Sullivan with his vehicle while fleeing a traffic stop Tuesday night. Police say Henderson had an outstanding warrant on a domestic violence-related charge. Sullivan is the second Houston-area police officer to die on duty in less than a week.