The man suspected of the shooting at a Dallas Immigration and Customs Enforcement field office on Wednesday opened fire "indiscriminately" from a nearby rooftop, killing one detainee and wounding two others in a van, authorities said. The shooting suspect was identified as 29-year-old Joshua Jahn, multiple law enforcement sources told ABC News. Authorities said he took his own life. Here's what we know about the suspect. There is no word yet on a possible motive. However, FBI officials said rounds found near the suspect contained "messages that are anti-ICE in nature." FBI Director Kash Patel released an image of recovered shell casings, including one that had been engraved with the phrase "ANTI ICE," he said. While no officers were injured, the Department of Homeland Security said the sho

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