Despite a heavy police presence at a Hells Angels funeral Saturday, a top bike-club enforcer nicknamed "Mr. 187'' after the state penal code number for murder was gunned down Saturday in front of stunned spectators. Multiple sources told this newspaper the victim was Steve Tausan, a notorious sergeant-at-arms for the Santa Cruz chapter of the club suspected of killing another biker years ago. Sources said the incident Saturday was an inter-club squabble set off when Tausan punched a fellow biker and the biker retaliated by shooting him. A photographer for this newspaper saw other Hells Angels jump the shooter. Police declined to comment, saying only that there had been a shooting at the Oak Hill Cemetery. The funeral at the cemetery was for fellow Hells Angel Jethro Pettigrew, president of the San Jose chapter of the club, who was shot in a Sparks, Nev., casino by a member of the rival Vagos club. Townsend told a reporter that shortly after Pettigrew was killed that he had received death threats. Police and Santa Clara County Sheriff's Office are now guarding the Hells Angels headquarters in San Jose, as well as other locations where bikers gather.