Who is Barry LeRoy, the Roach from The Rocky Road to Romance and what is their importance?

On her second day of traffic reporting, a station manager sends Daisy to cover the apprehension of a drug dealer, presently at a standoff with the police. While trying to find a place to park her traffic car, Daisy accidentally runs into the Roach, literally. She knocks him down long enough for the police to make the apprehension