Robert Crampton, 62, served time after he shot at police in Las Vegas in 2013. He was not allowed to own any ammunition.
On Thursday, police arrested Crampton after a anonymous tip last month about weapons and ammunition that he owned.
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A family member told investigators that Crampton had been talking about preparing for the end of the world and said he needed to stock up on guns, food and water for a zombie apocalypse.
A judge has set Crampton's bond at $100,000.
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