MONROEVILLE, Pa. — (WPXI) – An 18-year-old was reported missing two hours before police say they found her shot to death in Monroeville. Emergency crews were called to Cambridge Square Apartments around 3:15 p.m. Wednesday. Once on scene, they found the victim, Joselyn Thomas, 18, shot to death. Thomas was reported missing to North Versailles police at 1:20 p.m. Wednesday. Detectives say Albert Williams, 18, of Wilkinsburg, is responsible for the deadly shooting. Williams has been arrested and detectives are working with the DA’s office on appropriate charges. A motive has not been revealed.