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John Wilson Bennett and Mark Booth Bennett were allegedly caught on Nov. 17 discussing plans to kill ICE officers

Mark was also heard saying he planned to meet with “likeminded individuals” in Las Vegas to buy firearms, authorities claim

In a statement to PEOPLE, Mark's attorney called the case a "gross overreach by the government"

A Virginia assistant principal and his brother were recently caught discussing how to kill immigration officers, authorities allege, though their attorneys maintain the conversation is unsubstantiated.

Federal investigators began looking into John Wilson Bennett and Mark Booth Bennett on Nov. 17 after an off-duty Norfolk, Va., police officer overheard them planning to “kill police officers and ICE [Immigration and Customs Enforcement] agents,”

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