Desc: Half-Ton Killer?: Directed by Jeff Keels, Tom Mireles. With Jetta Brown, Raul Reyna, Bernie Rosales, Jamie Rosales. Special follows one of the most controversial and shocking murder mysteries in recent U.S. history. Mayra Rosales, one of the world's heaviest women, confessed to killing her nephew while baby-sitting. But the facts just didn't add up.