Updated at 4:25 p.m. ET
No, he's not in trouble; McCain was simply reporting for jury duty.
"We'll see if we can't institute law and order here in Maricopa County," he told AZCentral.com on the way into the courthouse. "We're out to get those criminals," McCain continued, with a chuckle.
A few hours later, McCain updated his Twitter followers, saying he was picked for a panel.
And at just before 4 p.m. ET, McCain was sent home without a trial.