An adult male suspect boarded a Fremont bound train from Bay Fair Station. The victim was already aboard the train and he saw the suspect board the train. The victim has had prior run-ins with the suspect before so, he tried to gather up his stuff to get away from the suspect. Before he could leave, the suspect recognized the victim and sprayed him in the face with pepper spray. Officers intercepted the train at the Hayward station and contacted the involved parties and witnesses. The pepper spray was recovered. The suspect was arrested for Assault with a Caustic Chemical, Public Intoxication, and a Probation Violation. The suspect was very intoxicated and did not give a statement. The suspect was booked at the Santa Rita Jail.