There's a scene where a woman finds out that she saw a face behind a bed. It was a man with long hair and perhaps a beard. I know it is a scene from twin peaks but although I tried to find it, in the end I couldn't! They were trying to find a solution to a murder but nobody could until a woman (I think) tried harder and thought that she saw a man's face behind a bed... someone please?

It's from the alternate ending to the pilot episode (the ending was added so it could be released as a movie):
Twin Peaks - European Pilot ending (Part 1) - YouTube (http://youtu.be/dNYgEmF8C78)

That's it! I saw some scenes that were similar but this is the one! Thanks a lot!