In People v. McLaughlin (1952) 111 Cal.App.2d 781, the defendants provided a "wire service" to known bookmakers with knowledge that such service was essential to successful bookmaking. The defendants denied aiding and abetting the bookmaking, however. The Court of Appeal affirmed the convictions on the ground that the provision of the service with knowledge of its unlawful use constituted aiding and abetting the book making. (111 Cal.App.2d at p. 789.)