In a brand-new jailhouse interview, Sabrina Zunich tells the chilling story behind her foster mother's murder and describes the salacious secrets that led to it. In her own words, she details why she snapped and how she feels about it now, behind bars.

Serving a life sentence for a murder she claims she didn't commit, Teresa Kotomski talks on camera for the first time, sharing the intimate secrets of her rocky marriage and detailing what she now alleges caused her husband's painful poisoning death.