The ending (spoilers)
I know that it was usual to have depressing endings in the 70's, at least pre-Star Wars. But what the hell was with that ending? It didn't anything to do with the rest of the movie, not ironic or anything, just depressing.
I thought the rest of the movie was pretty good, but that ending was just not needed. Realistic, sure. Cops get killed every day, but this was a movie, where usually the dots are connected in the story. It would have made just as much sense if they all had ended up eating bananas at the end. I don't get it.