Pellicano is an acknowledged expert in the technology of audio surveillance and has worked for the FBI on several occasions, turning garbled intercepts into usable evidence.  In 2001, he helped the FBI analyze wiretap evidence against Sammy "the Bull" Gravano, former underboss of the Gambino crime family in New York, who had relocated to Arizona and started dealing drugs in quantity there.  Gravano was tried and convicted of narcotics trafficking.

 Pellicano had compiled an