What is the title of this Movie?

It's this movie where this college boy has his parents killed. They
get murdered and his sister lives. He hired his buddy to do it, but
the buddy was just supposed to steal some stuff. The police find out
because the kid makes a map for his buddy and they find the map, and
then they realize that the hand written W on the map is the same as
the son's handwriting. Probably a 90's movie.