Richard Leonard Kuklinski aka "The Iceman"

Mark Twain always said, "find a job you enjoy doing and you will never work a day in your life." And "The Iceman" did just that by becoming the personal hitman to the Gambino crime family.

Dr. Harold Shipman

While every doctor pledges to do no harm, Dr. Shipman must have missed school that day cause he has a nasty habit of pumping patients with morphine and changing medical records and wills after patients died.