The manual of WITSEC, the U.S. Marshals agency that oversees the Witness Protection Program, describes three stages of agency involvement.
The Red Zone—when a subject is held in protective custody, while in prison or on trial.
The Green Zone—when that subject, along with his or her family, has been placed in a new identity and location and is living securely in that identity, known only to his WITSEC case agent.
And the Blue Zone—the state most feared, when there is suspicion that a subject’s new identity has been penetrated or