I actually watched the "Line of Duty" segment which was done on this incident. If I remember correctly, the shooter was a Vietnam and used a M1 Carbine. He was a socopathic nut job who had a history of problems with the police, gov't and authority in general. One of those idiots, like David Koresh or Carl Drega, who some of the more "radical" members of the gun media tries to put up as some sort of 2nd amendment "Patriot".
The Officer died at the scene. The shooter was found a few hours later, alive , gut shot and hiding behind a tree on his own property. He stated to the cops who found him that he was "Waiting to die". After he was arrested, he told the police that he wasn't trying to kill the officer, because he using an M1 Carbine and he didn't think the rounds would penetrate his vest.