William McNamara=Ricky Nelson
William McNamara, who plays the killer Peter Foley in this film, looks exactly like old-time singer Ricky Nelson. Look at this picture of Ricky Nelson:
http://mypage.uniserve.ca/~druckle/RICKY%20NELSON%20FAVORITE%20PHOTO.jpg
Now Juxtapose it with this photo of McNamara, from the IMDB gallery:
http://www.imdb.com/gallery/hh/0001530/HH/0001530/billyfacecolorimdb.jpg?path=pgallery&path_key=McNamara,%20William
It's undeniable, IMHO.
Sand is overrated. It's just tiny, little rocks.