An expert in electronic eavesdropping devices, bomb detection, and
explosive detection equipment. According to his autobiography "Odyssey
of an Eavesdropper (2005)", his clients once included "FBI, CIA, DOD,
DIA, NIS, NSA, DMA and DEA -- as well as the Secret Service, the
intelligence commands of the army, navy, air force, customs, and state
and local law enforcement agencies."