Known to authorities as "The Lady Killer", this suave Argentinian was arrested on March 9, 1994 after a 20-year murderous rampage. His first victim was a young woman in New York who he strangled and stabbed in the early seventies. Caputo was arrested for the murder and placed in Mental Hospital from where he subsequently escaped.

A smooth-talking con artist, Ricardo left a trail of blood spanning from New York to San Francisco and Mexico City.

Although he's been only charged with four victims, it is believed that has tally is much higher. One possible victim, Devan Green, a waitress in Los Angeles' Scandia Restaurant, was found dead in 1981. LAPD have linked Caputo to the restaurant where, at the time of the killing, he was working in the kitchen under the alias of Bob Martin.