A former midshipman has been arrested for sending a false threat to the Naval Academy that led to a lockdown and mistaken shooting last week, authorities announced Tuesday.

Jackson Fleming, 23, sent the threat on Sept. 11 , prompting the shutdown at the prestigious institution in Annapolis, Md., the Justice Department said in a press release.

Investigators said Fleming used a false IP address to make it look like he sent the threats from inside the academy , according to NBC News. Cops said Fleming had previously been kicked out of the school and was instead at his home in Chesterton, Ind. at the time the threats were sent.

During the lockdown, rumors swirled that the “shooter” — who did not actually exist — was impersonating law enforcement . When a security officer entered a d

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