Barney was a racketeer who worked for Boss Herrod who in turn worked for Big Boy while Caprice was still in jail. When Tracy arrested Slip Buckley in a racketeering sting, Barney was acting as lookout. Not immediately arrested, Barney reported what happened to Boss Herrod in his home. Unknown to him, Pat Patton followed him to Herrod’s home and learned that the ex-politician was involved. Patton followed Barney to the penitentary where he also learned of Big Boy’s involvement.
Barney would later be part of the crew that captured and tried to execute Tess and Tracy in a burning home. That effort failed (of course) and Barney disapeared from the story.