Agent Brown was one of the Agents, working together with Jones and Smith.
He was the first agent to have a prominent role , as was the one who chased Trinity on the rooftops. He worked in the the background from then on , until he injected Morpheus codebreaker with a program (in the form of silver liquid) , while the rebel was interrogated by Agent Smith .
He, like the other two Agents , was again temporarily killed when Neo them blew away with a minigun mounted on a chopper . After Neo blew up Smith , both he and Agent Jones ran away and were never seen again.He may have been deleted and replaced with superiors agents or, presumably, had been updated to become Thompson , Jackson or Johnson. He and Jones' fates are not made clear in the films.