Henry Don Williams is in Solano County Jail.
Police say 32-year-old Williams waived his extradition rights in a Nevada courtroom early Tuesday morning. Williams was arrested Saturday in Las Vegas, where authorities say he was working at a restaurant under an assumed name.
Authorities say Williams fired the bullet that hit the 22-year-old councilman Matt Garcia in the back of the head on September First. Williams and another suspect in the case -- Gene Allen Combs of Suisun City -- have been charged with murder.
Police say they believe Williams and Combs were in the area to collect a drug debt, and Williams mistook Garcia for someone else. They say Garcia was an innocent victim.
The Associated Press contributed to this report.