When Sheena Morris was found hanged in a Florida hotel room on New Year's Day 2009, her death was ruled a suicide. But the 22-year-old's parents, Kelly and David, say they believe their daughter was murdered and have since been working relentlessly to reopen the investigation into her death, which is now under review. On Dr. Phil's stage, they come face to face with the man they believe killed Sheena -- her 48-year-old fiancé, Joe. Were there clues missed in the original investigation? Then, Joe says he believed Sheena was suicidal in the days leading up to her death -- so why did he leave her alone in the hotel room after a heated argument? Does his story add up? Joe takes a polygraph to prove his innocence. Don't miss the shocking results!