Alfred Hitchcock based the killer on Jack The Ripper, and because the Ripper was never caught, I don't think Hitchcock would have revealed his serial killer either.
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Harvey.
The killer is Kenny Hampson, the boy they played the prank on at the very beginning of the movie. You know, the skinny little geeky guy?
jill
I think anything with the movie KILLER is just.... why??? It kills your brain and imagination. You might think I'm stupid. the movie certainly has it's thrills. Maybe once in a while those movies are good to watch. overall it's an okay movie.
You may be thinking of the made for t.v. movie called "Cabin by the Lake" with Judd Nelson playing the killer. Give it a go.