Federal authorities say a man arrested at Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s rally in Las Vegas on Saturday wanted to kill the GOP candidate, according to court documents.

A complaint filed Monday in U.S. District Court in Nevada charges Michael Steven Sandford with an act of violence on restricted grounds.

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Sandford said he drove to California to kill the presumptive presidential nominee, according to an agent Swierkowski — whose first name was not included — but changed his destination to Las Vegas after learning that Trump was holding a rally there. Sandford said he reached Las Vegas on Friday, according to the complaint, and practiced his shooting skills at a gun range.

Las Vegas police arrested Sandford, 19, on Saturday, when he allegedly tried disarming a police officer at Trump’s rally at the Treasure Island Casino.

Police said Sandford approached a uniformed officer and began a conversation, claiming he was seeking Trump’s autograph.

Sandford allegedly tried taking the officer’s weapon during the exchange. He was ultimately taken into custody and turned over to Secret Service agents without further incident.

Updated at 5:39 p.m.