Dallas ICE facility shooter feared radiation exposure and practiced shooting, records show Newly released records reveal details about the gunman who attacked a Dallas immigration facility in September. Joshua Jahn's parents described him as “completely normal” before moving to Washington state, where he believed he developed radiation sickness. The 29-year-old killed two detainees and wounded another before taking his own life. The records show Jahn was unemployed, isolated, and obsessed with artificial intelligence but do not indicate a clear motive for the attack. He practiced target shooting in Oklahoma a month before the attack. Federal authorities have previously said Jahn left notes indicating he wanted to ambush U.S. Immigration and Customs Enforcement agents. His parents did not r

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