
Los Angeles (CNN) -- The anonymous tipster who launched a massive investigation into the videotaping of alleged sexual assaults of severely disabled women in care homes came forward and met with authorities Sunday, Los Angeles County sheriff's detectives said Monday.
The meeting lasted several hours, and the informant said he had feared for his safety when he decided to anonymously mail 13 DVDs containing more than 100 hours of video last March, authorities said.
Authorities have arrested one suspect who turned himself into the sheriff's office, and another is already in state prison serving a sentence for sexual assault of a disabled person in a care home, but authorities have yet to determine if his crimes were the same as those captured on the video, investigators said.
Authorities are still seeking two more suspects based on composites they drew from the video. Investigators said at least six more men are believed to have been involved in the sexual assaults on the video, but they said they weren't able to draw composites on them from the grainy video.
The tipster, a computer technician, reiterated Sunday that a drug addict gave him a computer and asked him to clean the hard drive, authorities said.
He found videos on the hard drive and became sickened by the graphic footage of the sexual assaults, authorities said.
Los Angeles County sheriff's investigators subsequently reviewed the videos and determined at least 10 men were sexually assaulting at least eight women who were severely disabled, including one who resided in a residential care facility, authorities said.
The informant told investigators Sunday that he still feared for his safety and asked his name not to be released, authorities said.
"We are very grateful to this man and are confident the public is too. He did the right thing by providing the footage to us and an explanation note," Detective Sgt. Dan Scott of the sheriff's Special Victims Bureau said in a statement.
"When we reached out to him through the news media and asked for him to help us, he responded and helped us. In fact, he said the overwhelming amount of news coverage and public outrage encouraged him to step forward," Scott said.
One suspect, Ernie Lloyd, 27, was arrested at West Hollywood Sheriff's Station Saturday evening, authorities said.
On Saturday morning, Lloyd went to a Los Angeles police station, "saying that he had seen himself on the news and that he knew he was wanted," a sheriff's department statement said.
During an interview with detectives, Lloyd "implicated himself," authorities said.
He was arrested on suspicion of rape of a person with disabilities and bail was set at $100,000, authorities said.
On Friday, authorities said another suspect had been identified as Bert Hicks, 41, who is now serving a state prison sentence in California's Tehachapi State Prison for fiduciary crimes, abuse and sexual assault in a residential care facility.
Hicks allegedly took a disabled woman to Las Vegas, married her and then brought her back to the care facility, where she was repeatedly sexually assaulted by other men, said sheriff's Detective Ron Anderson. Authorities don't know if the crimes Hicks was convicted of are the ones depicted on video, he said.
Authorities said the graphic video even depicted one female victim in a wheelchair who was wearing a diaper.
The suspects allegedly sexually assaulted "people in bed unable to move. They can't pick up the phone," Scott said.
Added Anderson: "I've seen a lot of terrible, terrible imagery in my assignment that involved children and all kinds of hideous things. This is among the most heinous I've ever seen. ... What I saw was just these poor people lying there being victimized in the most terrible way I've ever seen."
The video was shot by a security camera and a handheld camera, Scott said.
Capt. Mike Parker of the sheriff's headquarters bureau said more than 50 different tips have been sent to a hotline set up by investigators. "This is exactly what we wanted," Parker said, who described the response of quality information as "overwhelming."