Four cases of sexual assault were reported in State College over the weekend bringing the total to fifteen since Penn State students returned in August.  University Police are investigating a reported rape in a dorm room on Friday night.  On Saturday night, a woman reported being inappropriately touched at Indigo Nightclub.  Police are also investigating a reported sexual assault on the west side of campus on Saturday night, police say the victim knows the suspect.  A fourth sexual assault was reported Saturday afternoon.  Anyone with information that leads to an arrest could receive a one thousand dollar reward.