One of LAPD's most promising detectives, Carl Lyons has known Mack Bolan since the beginning of his Mafia war. At the time, he did not approve of Bolan's methods and was, in fact, part of a special LAPD unit known as the Hardcase Corps, specifically designed to bring Bolan in, dead or alive. That all changed when Mack Bolan saved his life during his mission against Julian DiGeorge. Lyons would later be recruited by the Sensitive Operations Group, a special organized crime task force led by Hal Brognola.