On March 29, 2008, a local domestic violence shelter hotline took a call from a female, identifying herself as "Sarah", and claiming to be a 16-year-old victim of physical and sexual abuse at the church's YFZ Ranch. Investigators eventually established by tracing the calls that they were placed by a much older woman, Rozita Swinton, who had been arrested for previous hoax calls posing as abused and victimized girls. The call triggered a large-scale operation at YFZ Ranch by Texas law enforcement and child welfare officials, beginning with cordoning off of the ranch on April 3. Law enforcement officers were armed with automatic weapons, SWAT teams with snipers, helicopters, and Midland County provided an M113 armored personnel carrier as backup, but they were met with no armed resistance. Authorities believed the children "had been abused or were at immediate risk of future abuse", a state spokesman said. Troopers and child welfare officials searched the ranch, including the temple's safes, vaults, locked desk drawers, and beds. They found evidence leading them to believe that the beds were "in a part of the temple where 'males over the age of 17 engage in sexual activity' with underage girls". A religious scholar later testified in court that he does not think sexual activity occurs in the temples of FLDS sects, and that temple service "lasts a couple of hours, so all the temples will have a place where someone can lie down". Child Protective Services (CPS) officials conceded that there was no evidence that the youngest children were abused (about 130 of the children were under 5), and evidence later presented in a custody hearing suggested that teenage boys were not physically or sexually abused.