i saw that with my father when i was a kid. I think its an italian movie (maybe french). A man witness a rape-murder on the side of a forest. He goes home and decide to do nothing. Next few days he sees a police sketch artist in the newspaper that look like himself.
The Killer saw him, the witness, and went to the police and told them that he saw a man kill a woman.

Now the witness is wanted for murder.

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