Biiiiiig honkin' plot hole
During his interrogation, the cops accuse Steve Guttenberg of having gone to the bar where the blond girl was dancing (and where the waitress dumped the beer on him) the same night Elizabeth McGovern was assaulted.
Except this doesn't make any sense. Guttenberg's bar visit took place one or two nights after McGovern was assaulted -- indeed, after the cops brought him in for the line-up.
It was right after the line-up that Guttenberg followed the red-headed killer to the bar.