I had this in my last english exam and I had a to choose between 4 answers "this is the man (who-whose-who's-which) stolen my car" "who" is the only answer which makes sense to me although I think the whole question is grammerlicaly incorrect
"who's" is "who has" which would make the sentence grammatically correct.
It has to be who's = "who has".
"He stolen my car" is incorrect. "He stole" or "he has stolen".