DALLAS (AP) — The gunman who opened fire on an Immigration and Customs Enforcement facility in Dallas hated the U.S. government and wanted to incite terror by killing federal agents. That’s according to authorities, who held a news conference Thursday offering the first hint of a motive in the attack. Citing handwritten notes found at his suburban home, officials said 29-year-old Joshua Jahn set out to ambush the agency and then fatally shot himself following the assault. The shooting at daybreak Wednesday targeted the ICE office building, including a van in a gated entryway that held detainees. One detainee was killed, and two others were critically wounded. No ICE personnel were hurt.