Guilty as charged?

Rating: Null/10 (30 December 2002)

I dont mean to be controversial here, but I read the book some time ago, and over the last couple of days, watched the film again. And nowhere I can remember, can it conclusively prove that Andy Dufrene did NOT kill his wife and that Glen geezer. All we have to go on is him saying that he didn't and the fact that we all like him as a character. Yes it does seem against his nature, but a lot of murders must be against peoples nature's, but they still happen.
Anyone else agree that he could be the killer?