Known as the "Hillbilly Donnie Brasco," FBI agent Scott Payne risked his life to expose violent neo-Nazi cells threatening ...

An undercover police officer dressed as a ... The Escuadron Verde, or Green Squad, often kit their agents out in fancy dress on special occasions. They have previously been joined on drugs raids ...

Jay Dobyns is a retired ATF agent who went undercover with the Hells Angels from 2001 to 2003 as part of Operation Black Biscuit. He speaks with Insider about his experience with the outlaw ...