Home ⇒ Security ⇒ Local Defense / Security Threat Management Center (Detroit) Article still in progress. (Just need to add a cite a couple claims and clarify a couple statements) Background The Threat Management Center (TMC) is ... San Francisco Patrol Special Police The San Francisco Patrol Special Police is a private security organization in San Francisco. They have been in existence since 1847 , since before it ... Guardian Angels The Guardian Angels is a vigilante crime fighting organization . It was started by Curtis Sliwa in 1979 in New York City, and were originally ...