By Andrew Rice
The Center Square

FBI Director Kash Patel suggested the suspected shooter in the Sept. 24 attack at a Dallas Immigration and Customs Enforcement facility engaged in a “high degree of pre-attack planning.”

In a post to social media on Thursday, Patel said the FBI “have been working 24/7 to seize devices, exploit data, and process writings obtained on location and in the subject’s person/residence/bedroom.”

Law enforcement identified the suspected shooter as 29-year-old Joshua Jahn, who allegedly killed one detainee and injured two others.

Jahn died from a self-inflicted gunshot wound, according to authorities, after firing on the ICE facility “indiscriminately” from a nearby building before 7 a.m. on Wednesday.

“The perp downloaded a document titled ‘Dallas County Office of Homeland Security and Emergency Management’ containing a list of DHS facilities,” Patel said.

Patel also said the suspected shooter made multiple ballistics searches and searched for the “Charlie Kirk Shot” video between Sept. 23 and Sept. 24.

Between Aug. 19 and Aug. 24, the suspected shooter searched apps that “tracked the presence of ICE agents,” Patel said.

Patel also said a handwritten note recovered by the FBI read “Hopefully this will give ICE agents real terror, to think, ‘is there a sniper with AP rounds on that roof?’”

Patel posted a photo to social media on Wednesday of unspent shell casings, with one of the casings reading “ANTI ICE.”

“These despicable, politically motivated attacks against law enforcement are not a one-off,” Patel said.

On Aug. 25, the same Dallas ICE office received a bomb threat from who authorities identified as Bratton Dean Wilkinson. DHS officials said the suspect arrived at the facility’s reporting entrance and claimed to have a bomb in his backpack.

The incidents followed a July 4 shooting at an ICE facility in Alvarado, Texas, which resulted in one officer being shot in the neck.

“For months, we’ve been warning politicians and the media to tone down their rhetoric about ICE law enforcement before someone was killed,” said DHS Secretary Kristi Noem. “This shooting must serve as a wake-up call to the far-left that their rhetoric about ICE has consequences. Comparing ICE Day-in and day-out to the Nazi Gestapo, the Secret Police, and slave patrols has consequences.”

“The violence and dehumanization of these men and women who are simply enforcing the law must stop. We are praying for the victims and their families,” Noem added.