In 2003, he was arrested for possession of
marijuana.
Popper was also arrested on
March 6 2007 near
Ritzville, Washington by Washington State Patrol. He was the passenger in his own vehicle and was found to be in the possession of a small amount of marijuana and weapons. Popper was released the same night. Popper had a stash of hidden weapon compartments in his vehicle that contained four rifles, nine handguns, a
switchblade knife, a
Taser, and
night vision goggles. Popper's vehicle also had flashing emergency headlights, a siren and a
public address system. Popper explained that he had installed these items in his vehicle because in the event of a natural disaster he didn't want to be left behind.
Officers also recovered a small amount of marijuana and a marijuana pipe. The vehicle was temporarily seized.
No charges were filed for the weapons, as they were all registered and securely locked away, and Popper was licensed to carry them, with the exception of the
brass knuckles and switchblade knife which Popper agreed to surrender. A deal was reached that allows the marijuana charge to be dropped if Popper remains free of further drug infractions for one year and attends eight hours of drug counseling. Popper and the driver had been driving back to Washington from
Austin, Texas, and Popper likes to visit gun ranges during long trips.