
An in-depth look at some of the world's most dangerous murderers.

In 1995, mother and daughter Marcia and Elizabeth Honsch went missing.

In 2012, Diane Staudte murdered her husband and son in addition to attempting to kill one of her daughters.

In January 2009, Lakhvir Singh poisoned her former lover, Lakhvinder Cheema and his fiancée Gurjeet.

In 2011, hotel receptionist Attila Ban turned from co-worker to killer when he was alone with his colleagues.