The convictions effectively dismantled the chapter. In 2008, Mark "Papa" Guardado, the president of the San Francisco chapter, was shot dead after a bar fight in the Mission District of San Francisco. Christopher Bryan Ablett, a member of the rival Mongols MC club, was later arrested for Guardado's murder. In 2011, president of the San Jose chapter Jeffrey Pettigrew, was shot four times in the back on September 23, 2011 at a casino in Sparks, Nevada. Two California members of the Vagos motorcycle club at the crime scene were also shot but survived. Pettigrew was in Sparks for 'Street Vibrations', a long-running motorcycle festival in the Reno area. Sparks declared a state of emergency after another motorcyclist wearing Vagos colors was shot shortly afterwards in the stomach from a passing vehicle. Cesar Villagrana, who had been with Pettigrew, was charged with discharging a firearm and other offenses. Ernesto Manuel Gonzales was later arrested in San Francisco in connection with the death of Pettigrew. Another Hell's Angel, Steve Tausan, an "enforcer" for the Santa Cruz chapter, was shot at Pettigrew's funeral. According to police, after the shooting, the suspect, Steve Ruiz, disappeared and one or more people tampered with the crime scene, washing away bloodstains and removing evidence of the shooting. Four leading members of the Hells Angels in northern Illinois were arrested and charged with numerous crimes including violating the Racketeer Influenced and Corrupt Organizations (RICO) Act in 2005, following a four-year federal investigation into the club. At least three were convicted; Melvin "Road" Chancey (president of the Chicago chapter from 1997 to 1999) was sentenced to nine years in prison, David G. "Pulley" Ohlendorf (president of the Spring Valley chapter from 2003) was sentenced to four years in prison and Richard A. Abrams (a former president of both the Rockford and Spring Valley chapters) was sentenced to three years in prison during trials in June and July 2006. Their group carried out the June 25, 1994 shooting of a rival club president in Cook County, threatened to bomb a rival gang's clubhouse in Kankakee in March 1995, and planned two murders in Peoria and Joliet, crimes they committed to protect sales of cocaine and methamphetamine with a street value of $624,000 from 1993 through 2002. In October 1988, Ralph "Sonny" Barger, the Hells Angels' Oakland (California) chapter president and reputed national leader, and Michael Vincent "Irish" O'Farrell, the former Oakland president, were convicted of plotting to carry out bomb attacks in Louisville and elsewhere against members of the Outlaws.