A native of Baton Rouge, Louisiana, Civello had moved to Dallas as early as July 1928 when he was arrested for the murder of Joe DeCarlo at the St. Paul Drug Store in Dallas. Reportedly, DeCarlo's dying words were that the close-range shotgun blast to his abdomen was accidental. Based on this information, a grand jury did not issue an indictment against Civello. Civello was an expert marksman and regularly participated in skeet shooting competitions as a longtime member of the Dallas Gun and Skeet Club. Civello's father Philip Civello was an original member of the Dallas crime family under founding boss Carlo T. Piranio.