Investigators are trying to determine if a suburban Kansas City, MO, police officer who was critically injured when he responded to a reported robbery was struck by a bullet from two suspects or from a fellow officer, authorities said Thursday.
Four men were charged after a confrontation Wednesday that injured Officer Thomas Wagstaff, 42, a 15-year veteran of the Independence, MO, Police Department. Wagstaff underwent surgery and remained in critical condition Thursday, reports the Associated Press .


