What is the name of this film?

Question

Its a horror, i think it came out in the 90's, about these 3(maybe 4) college boys who start talking in class about the perfect murder, and think that they could commit a perfect murder, and then end up killing a few people.

Bad description I know, but I havent seen it in years and am looking for it now.

Thanks

Answer 1

The only movie i can think of that is similar to that is Murder By Numbers

Answer 2

Possibly the Alfred Hitchcock film "Rope".

Answer 3

It could be 'Murder by Numbers'????