FROM DEBUTANTE TO KILLER: AN UPPER-CLASS WOMAN ACCUSED OF MURDERING HER HUSBAND, ON "20/20," FRIDAY, JULY 30 AT 10:00 PM ET

How can a person living a life many can only dream of suddenly become a cold blooded murderer? Kelley Cannon was an attractive, well-to-do debutante who lived in a grand house with beautiful kids and a loving attorney husband. But after a back injury left her abusing drugs and spending time in rehab, her world started to fall apart. First her husband, James, filed for divorce, than he won temporary custody of their four young children. After James was found dead in a closet, strangled to death by a phone charger cord, all eyes turned to Kelley. Was this once petite woman capable of killing a man -- the man she once loved - with nothing more than a phone cord? Jim Avila's report on a murder mystery that shocked Nashville includes an exclusive interview with Kelley from jail. "20/20" airs on FRIDAY, JULY 30 (10:00-11:00 p.m., ET) on the ABC Television Network.

"20/20" is anchored by Elizabeth Vargas and Chris Cuomo. David Sloan is executive producer.