A Florida man who had previously been declared “criminally insane” was arrested last week when he was stopped in a van with an arsenal including dozens of weapons and thousands of rounds of ammunition.

According to the Tampa Bay Times, 58-year-old David Harris Dunaway was stopped for speeding when deputies discovered that he was already wanted by a federal authorities. Dunaway had been indicted by a grand jury in Tampa on Dec. 18 for claiming he had a pistol and 50 rounds of ammunition.

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Dunaway’s medical history made it illegal for him to own firearms.

During the search of Dunaway’s green Honda van on Saturday, deputies discovered 36 guns and 4,629 rounds of ammunition.

He told the officers that he had been driving to the flea market in Waldo to sell “some” of his arsenal.

Dunaway had been confined to a hospital following the 1992 fatal shooting of a trucker. In that case, he was found not guilty by reason of insanity. It was not immediately known how long he had been confined in the hospital or why he was released.

“If I recommended insanity in that case, he must have been insane,” Tampa forensic psychologist Robert M. Berland told the Tampa Bay Times.

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[Photo credit: Alachua County Sheriff’s Office]