Special Surveillance Group
The Special Surveillance Group (SSG) is a highly classified unit of non-Special Agents within the Federal Bureau of Investigation specializing in clandestine vehicular and foot surveillance of foreign nationals and U.S. citizens known or suspected of engaging in espionage or terrorism both in the U.S. as well as around the world. SSG members are titled "Investigative Specialists."
These Investigative Specialists attend specialized training at the FBI Academy in Quantico, Virginia. They carry FBI credentials and badges, and conduct much of the same investigative work the Special Agents carry out. Even though not Special Agents themselves, SSG ranks have been bolstered with former Police Officers for their experience and are armed.[1]