Florida man arrested by FBI for alleged extremist Signal chats, explosives

A Florida man was arrested after an FBI investigation linked him to several extremist group chats on the encrypted messaging app Signal, where agents say he used pseudonyms to share disturbing graphic messages, detailed instructions regarding explosives and violent neo-Nazi propaganda.

Lucas Alexander Temple, 20, faces federal charges for disseminating information regarding the manufacture or use of explosives and possession of an unregistered short-barreled shotgun, according to court documents.

According to criminal complaints, Temple shared a hand-drawn diagram of a homemade detonator, linked to YouTube videos describing how to synthesize TNT and make detonators, and published a 122-page extremist manual filled with white supremacist rhetoric.

Investigators said the chats also included explicit discussions promoting rape, torture and murder, including the killing of non-white children.

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Sharing neo-Nazi propaganda found at home and photo of Lucas Temple’s driver’s license.

Screenshots of messages allegedly sent by Temple’s aliases included phrases such as: “How long would it take to rape a femboy to death?” » and discussions about sexual assault against men.

Temple’s online aliases were linked to her real identity through personal details shared in chats — including her age, her job at a grocery store and a family visit to the museum — and were verified with state records and security footage, according to the complaint.

While executing a search warrant at Temple’s home Thursday, FBI agents found neo-Nazi propaganda, a book linked to Columbine High School shooters Dylan Klebold and Eric Harris, and a Springfield Model 67 Series E shotgun with a barrel shorter than 18 inches.

The barrel was reportedly sawed off and found in a separate area by investigators.

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Guns were found in Temple’s bedroom, authorities said.

ATF records confirmed that Temple was not registered to possess the weapon.

Officers also found a handwritten note that read: “Plans: Wear body cameras for live stream. Warn friends about live stream. Put flags on car. Play music on car speakers while operating. Place motion-activated bombs in doors (for cops).”

A handwritten attack plan was found in Lucas Temple’s bedroom, authorities say.

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Temple was taken into custody following the search.

At his first court appearance, Magistrate Judge Amanda Arnold Sansone ordered that he remain detained pending trial, finding that he posed a serious danger to others.