Sen. John McCain was released from jury duty after spending Monday morning in Maricopa County Superior Court in Phoenix.

The Arizona Republican was among 80 prospective jurors called for the re-trial of a man whose convictions in the 1991 killings of nine people at a Buddhist temple west of Phoenix were overturned on appeal. The trial is expected to last at least six weeks.

The judge released McCain after telling the other jurors that a U.S. senator is among those allowed out of service. Others would include an emergency room physician, the judge said.

McCain didn't ask for special treatment and said he would have served on a short trial even if he had to cancel a few meetings.