Christopher William Roby, 39, is suspected of having numerous other victims dating back to 2003, authorities said.
Roby was arrested on April 26 for rape by force/fear and is being held in lieu of $7,065,000 bail.
Anyone with information regarding the incident is encouraged to contact the Los Angeles County Sheriff's Department, Special Victims Bureau at (877) 710-5273. Anonymous information can be submitted by calling "Crime Stoppers" at (800) 222-8477.