u/Doomblade202

Hello all, today my girlfriend was riding on one of the muni metro trains and she said she was hit by a stranger multiple times on the arm and back. She said the cops were called, but all the witnesses had left the car by the time they arrived. And that they hadn't questioned her, but the person that had hit her. The cops left since the stranger had denied the allegations. Will the police be able to access the cameras in the metro if I report this incident to them again?