Cruise ship bliss turns deadly. Murder on the high seas.

Taking a cruise is supposed to be a happy time, but a death onboard certainly changes that. Today Nancy Grace takes a look at three murders that happened on the open seas. Joining Nancy Grace today: Kathleen Murphy - North Carolina, Family Attorney, www.ncdomesticlaw.com James Shelnutt - 27 years Atlanta Metro Major Case detective, SWAT Officer (RET), Attorney Dr Bethany Marshall - Psychoanalyst, Beverly Hills, www.drbethanymarshall.com Dr. Michelle Dupre - South Carolina Medical Examiner & Author of “Homicide Investigation Field Guide” Ray Caputo - Lead News Anchor for Orlando's Morning News, 96.5 WDBO