An Ohio mother who left her 16-month-old daughter home alone in a playpen for 10 days last summer while she went on vacation pleaded guilty on Thursday to aggravated murder. Kristel Candelario, 32, also pleaded guilty to child endangerment as part of a plea deal with Cuyahoga County prosecutors, who agreed to dismiss two murder counts and a felonious assault charge. Candelario now faces a life term when she's sentenced March 18.