UPDATE, 12:54 a.m. ET Aug. 9: The man suspected of shooting and killing a Missouri police officer late Sunday reportedly has been arrested following a two-day manhunt.

According to The Associated Press, Ian McCarthy, 39, of Clinton, was arrested Tuesday and charged with first-degree murder in the fatal shooting of Clinton police officer Gary Michael, 37.

McCarthy was apprehended after a driver reported a pedestrian on a Henry County highway, NBC News reported.

ORIGINAL STORY: A Missouri police officer was shot and killed late Sunday during a traffic stop, and the suspect is still at large.