An officer was at the station when he responded to a call of a female screaming for help in the passenger pick up zone. The officer located a female subject covered in blood. Hayward PD was advised and they responded as well. Hayward PD arrived and the BART officer assisted in placing the female subject in handcuffs. BART PD received information that the female subject may have been involved in a homicide that occurred in the city of Hayward. The case was turned over to Hayward PD. A BART sergeant was on scene to supervise and the video recovery team was also notified. BART Officers also assisted with securing the scene at the station.