Scientology's Secret Vaults: A Rare Interview With a Former Member of Hush-Hush "CST" - 2012-02-06
"CST was very hush-hush. Even among the Int staff, it wasn't well known. Anyone coming from CST, it was very sensitive," says Gary Morehead, who was chief of security at Int Base and oversaw the interrogation of executives who had gone awry. He had to sign a bond promising that he'd keep confidential anything that came out in those interrogations, which are known as "sec-checking." When it came to CST executives, however, Morehead says he had to sign a second bond.