Watch Crime Crossing the Line

Two men were convicted of murdering a millionaire and his entire family in order to take over his business. The bodies of Amarjit Chohan, his wife and her mother, from west London, were washed up on the south coast of England in 2003.

Peter Lundin strangled his mother to death in Maggie Valley, North Carolina. In 1992, Lundin was sentenced to 15 years imprisonment for the murder: his father, Ole Lundin, was sentenced to two years as an accomplice.

Michel Peiry is Switzerland's most extreme post-War serial killer. He killed at least ten times. He took young teenagers hitchhiking, tied them up, raped them, killed them, and finally burned their corpses.

Spanish serial killer Manuel Delgado Villegas was caught in 1971 when he confessed to murdering his own girlfriend--and then the truth started to tumble out.

Carlo Mazza, a prosperous entrepreneur in the smart town of Parma, Italy, was found shot in his car in 1986. Katharina, a pretty night club dancer and Carlo's lover, was the prime suspect.