What makes someone become a cold-blooded killer? Are they born that way or did something happen in their lives to turn them into a monster?
In Ted Bundy 's case, that's what scientists were desperate to discover - whether there was a biological indication that made him a depraved murderer who stole the lives of at least 36 young women in the late 1970s.
Bundy was a good-looking, well-spoken law student who even worked on a suicide prevention phone line.
