Black-Owned Security Firm Opens $2.5 Million Headquarters in Black Neighborhood John and Denitra Griffin, founders of AGB Investigative Services

Starting from a home basement office in 2001, AGB Investigative Services, a security firm founded by John and Denitra Griffin, just recently opened the doors of their new headquarters worth $2.5 million. It is conveniently located in the predominantly-Black neighborhood of Auburn Gresham in Chicago, Illinois. In 2001, the Griffins initially founded AGB as an investigation…