Reza Kahlili (a pseudonym) was an expat Iranian who returned to Iran after the fall of the Shah. He joined the Revolutionary Guard, but out of disgust with the Khomeinist regime started spying for the CIA under the code name “Wally”. He is presently living in Los Angeles under an assumed name, and published a book about his experiences called “A time to betray”. Here are two extensive interviews:
Is this guy’s story for real? We link, you decide.