Forty-nine-year-old David Dean Johnson of El Cerrito surrendered to a sheriff's detective on Monday.
Johnson and 51-year-old Scott Wayne Bailey of El Sobrante were recently named as suspects in the 2012 heist at the Siskiyou County Superior Courthouse in Yreka. About $1.3 million in gold, jewelry and artifacts were taken from a display case in the courthouse lobby.
Sheriff's officials say at least some of the gold proceeds appear to have been used to purchase other items. The Sheriff's Office is continuing to investigate the case.
It was not immediately clear whether Johnson had an attorney.