police say hall was riding her bike near campus and ran a stop sign when it happened. roberts car hit her and he took off and investigators say if roberts had stopped, he could have avoided the felony charge of leaving the scene of an accident. >>> investigators are looking into whether there are more possible victims of a former chester county boarding school teacher who is locked up on sexual assault charges. matthew scavitto lived on campus as a to determine supervisor -- to determine supervisor at the all boys school in malvern. he often went to a campus apartment to teach a 17-year-old about sex. they believe the encounters last more a year. they say there may be more victims out there. >> you look at the period of time the abuse took place. you look at the grooming and the betrayal of trust by this defendant, those are all red flags. >> officials say the phelps school is cooperating with the investigation and fired scavitto after the claims surfaced. school leaders are assuring families that the well-being of students is most important. >>> we are waiting to lear