Robert O’Neill, a¬†former Navy Seal, says he is innocent of a DUI charge and¬†says his insomnia treatment is to blame, according to USA Today.

Robert O’Neill, the former Navy Seal credited with shooting Osama bin Laden, says he is innocent of a DUI charge in Montana and blames his condition at the time of his arrest on a prescription drug he takes for insomnia.

O’Neill, who turned 40 on Saturday, was arrested early Friday in Butte, Mont., his hometown, by officers who found him asleep in a car with the lights on and the engine running outside a convenience store.

Officers said he appeared confused and somewhat lethargic when they opened the car door and woke him up, the Montana Standard reports.

The retired Navy SEAL refused a breathalyzer test and was jailed on a charge of DUI, a misdemeanor, according to the booking report. He was released after posting a $685 bond.

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