Is Craig a scientific experiment gone wrong?
I was watching this late night on TV and started to doze off near the last 10 minutes, but I distinctly remember in the operating room scene before Mandy is killed, several disfigured embryos in jars against the wall and a picture of a man in a lab coat....presumably a doctor. He had what looked like a young Craig with him in the picture in a later scene as well.
Would someone like to take a "stab" at explaining?
http://www.youtube.com/user/alexsgirl74