An anonymous tipster delivered a disturbing DVD to the Los Angeles County Sheriff's Department which contains "over 100 hours of video depicting a sequence of sexual assaults on women, all of whom appear to be disabled," reports the Daily News. At least 10 severely handicapped women are shown in the footage, which was copied to the disc from a computer hard drive.

"We do not know who the suspects or victims are," Capt. Mike Parker said, according to LA Now. "We do not know where or when the assaults took place, and that's why we very much need the public's help." Some of the footage may have been recorded at a residential care facility, though the scenes were shot at multiple locations.

The Sheriff's Department do not plan to release the video, but say they are looking for four male suspects.