Updated September 25, 2025 at 4:17 PM EDT

"I want to cause terror," the gunman behind Wednesday's deadly attack on a Dallas ICE immigration facility allegedly wrote in a note, according to authorities.

The 29-year-old gunman, who took his own life, also likely acted alone and had extensively planned Wednesday's deadly attack , according to Justice Department and FBI officials who briefed the media Thursday afternoon.

Officials identified the shooter as Joshua Jahn . In the days leading up to the attack, he researched Department of Homeland Security facilities and the fatal shooting of conservative activist Charlie Kirk ahead of the shooting, FBI Director Kash Patel said separately on social media.

Early Wednesday morning, Jahn fired at the ICE building and at a van, "indiscriminate

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