Dishonourable Mention: Clifford Robert Olson

Clifford Olson's crimes need no introduction. In addition to a lengthy previous record, he killed 11 children in the span of a year, offered to reveal where their bodies had been disposed of and plead guilty in return for a payout to his wife and young son, and then continued to taunt his victims from prison. He died as he should have, in jail and painfully of cancer, on 30 September 2011.