Are we in disagreement here? On either part? Correct me if I’m wrong, but I don’t think so.
Okay, I reread your post and the one you were responding to; even on re-reading your intention wasn't exactly clear, and is somewhat orthogonal to the issue in the responded-to post.
The responded-to post claimed that society shouldn't lose its right to exact vengeance on a crook just because a cop made a mistake. Your comment that the crook didn't victimize 'society' as a whole, but rather a number of individuals, in no way argues against the notion that victimized individuals shouldn't have their attacker go free just because of a cop's mistake. I mistook you as supporting such a notion.