Brooks. However, police were again unwilling to extend the search. In February 2012, a picture was released to the news media of a likely unknown victim of Corll. The color Polaroid image had been found in the personal possessions of Henley, which had been stored by his family since his arrest in 1973. The image depicts a blond-haired teenage youth in handcuffs, strapped to a device upon Corll's floor, alongside a toolbox known to contain various instruments Corll used to torture his victims. The individual depicted has been ruled out by the Harris County Medical Examiner as being any of Corll's known victims, including his one remaining known unidentified victim. Henley himself has stated that the picture must have been taken after he had acquired a Polaroid camera in 1972—although he is adamant that he has no idea who this boy is. Given that Henley became acquainted with Corll in 1972, it is likely this boy would have been killed in 1972 or 1973. Potential association with a national sex ring During a routine investigation in March 1975, the HPD discovered a cache of pornographic pictures and films depicting boys as young as eight, most of whom were from the Heights. Of the sixteen individuals depicted within the films and photos, eleven of the youths appeared to be among Corll's known victims who had been identified by this date. The discovery raised the disturbing possibility that the statements Corll had given to both Henley and Brooks prior to his murder that he was associated with an organization based in Dallas which "bought and sold boys" may indeed have held a degree of truth. The discovery of the material in Houston in 1975 subsequently led to the arrest of five individuals in Santa Clara, California. No direct link in these arrests to Corll was proven, as the HPD declined to pursue any possible link to the killings, stating they felt Corll's victims' families had "suffered enough." On August 15, 1973, just two days after investigators had uncovered the final bodies initially linked to the Houston Mass Murders, investigators in Dallas uncovered a nationwide homosexual procurement ring operated by John David Norman. This police raid seized a card filing system containing up to 10,000 names of individuals across America ascribed to this network and the personal details of numerous teenage boys exploited by this sex trafficking ring. There is still no conclusive