An Illinois mother of three was discovered dead in her home on a normal afternoon. Becky Bliefnick’s window was pried open, and her bathroom door was broken down, where she was found surrounded by shell casings. Earlier that day, her estranged husband picked up their kids from school, which was out of character. However, investigators had three persons of interest in mind. Find out what happened to Becky Bliefnick on this episode of “Killer Cases.”