Former University of Kentucky cheerleader Laken Snelling enters a guilty plea after her newborn infant was discovered deceased in a trash bag inside a closet. In Pennsylvania, an incoming college soccer player is brutally stabbed to death by her boyfriend, whose mother allegedly helped clean the crime scene and conceal evidence. A Colorado husband faces first-degree murder charges after claiming his wife committed suicide, as investigators uncover defensive fingernail wounds and an undisclosed extramarital affair. Sydney Silvagni reports.