I was thinking Usual Suspects but meant Primal Fear. I remember it pretty well. I've seen Usual Suspects and that there's some sort of twist [and even half a recollection of what it was but I won't mention it here for spoiler reasons in case I'm right
].
The other one that came to mind while reading the original post, was Double Jeopardy. It has good guys that seem like bad guys and vice versa. Sort of
. And a pretty decent synopsis of the Constitutional protection against double jeopardy as well.
Anyway - not sure if that helps at all but...
.
Carol