Anti-ICE gunman Joshua Jahn carefully plotted his assault on immigration officers before taking up a sniper position on a Dallas rooftop, and expressed a desire to instill “terror” in agents, new information released by the FBI reveals.

A handwritten note recovered by investigators said, “Hopefully this will give ICE agents real terror, to think, ‘is there a sniper with AP rounds on that roof?'”

Jahn, who opened fire at a van near the entrance of an ICE field office in Dallas on Wednesday morning, had also conducted multiple searches of the “Charlie Kirk Shot Video” between Sept. 23 and 24, just before the shooting, FBI Director Kash Patel said in an X post Thursday. 4

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He also searched for apps that tracked the presence of ICE agents, and downloaded a document titled

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