A man who claimed to have helped Natalee Holloway’s purported killer hide the missing Alabama woman's remains suffered his own violent death during a struggle with an ex-girlfriend. John Ludwick was a friend of Joran van der Sloot, the man believed to be the last person to see Holloway alive before she disappeared in Aruba in 2005. Nancy Graces looks at the bizarre end to Ludwick's life with Cold Case Research Institute director Sheryl McCollum, New York psychologist Caryn Stark, Juvenile Judge Ashley Willcott, and Investigative reporter Art Harris.