RC3 (Reginald Cornelius III) grew up in an old neighborhood of Chicago. Unimpressed by the levels of crime, he borrowed his brother's M-16 rifle that was brought back from Vietnam, dressed up in disguise and called himself The Street Avenger. Using the gun to shoot some gang cars to pieces and inspire fear, he moulded himself a dummy rifle out of rubber and continued to clean up the streets.
In late 1985 he encountered Michael and K.I.T.T., who assisted him in rounding up a couple of muggers, and later he loaned Bonnie the use of his father's garage and helped in the recreation of K.I.T.T. (who had been virtually destroyed by the Juggernaut).