An ABC 7 investigation of San Francisco-area jails revealed that they use cell extraction teams. "Cell extraction teams are specially trained groups of jail guards in riot gear, who use force to subdue the most dangerous inmates. Critics call the use of the teams a violation of human rights; law enforcement officials believe they are a necessary tool. ... the stories sparked protests by AIDS rights advocates after we revealed that cell-extraction teams were also handling AIDS patients." County supervisors and local prison rights advocates were unaware that such teams were being used in the San Francisco area.