An un-named Los Angeles man was arrested on Friday for the rape of 18 year old mentally disabled woman for 10 minutes on the back of a LA Metro bus. The woman who has the mental capacity of a 10 year old was unable to call for help or seek assistance until the assault was over. Hit the jump for more.

“Without any warning or provocation, (he) stood and faced her while positioning himself between her legs and sexually assaulted her,” a statement from the Los Angeles County Sheriff’s Department said.

The assailant, who was caught on tape by the vehicle’s security system, continued his horrific attack while an unidentified witness, the only other passenger on the bus, attempted to get the bus driver’s attention, authorities said.

“After about 10 minutes, the suspect stopped his assault and exited the bus when it reached the last stop at the turnaround,” the Sheriff’s Department statement said. “It was then that the victim reported the rape to the bus driver.”

Surveillance images depict the alleged rapist as a young African-American male who wore a striped hoodie sweatshirt and dark pants.

The arrest came after a search warrant was served on the suspect’s home in south Los Angeles, authorities said ahead of a Friday afternoon press conference.

Daily News