DALLAS (AP) — The gunman who on in Dallas, killing a detainee and critically wounding two others, left behind a note saying that he hoped the attack would “give ICE agents real terror,” the FBI director said Thursday.

The post by Kash Patel on offered the first hint of a motive behind the shooting on Wednesday that targeted the ICE building, including a van in a gated entryway. The detainees were in the van. No ICE personnel were wounded.

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