DALLAS, Texas – Investigators searching the background of Joshua Jahn, the 29-year-old suspect in Wednesday’s deadly ICE facility shooting, uncovered a strange detail linked to his car. Authorities say Jahn’s blue Toyota Corolla was found with a weathered poster stuck to its right rear quarter panel, depicting a map of radioactive fallout across the United States. The discovery has fueled speculation about the shooter’s mindset and possible motivations, though officials have yet to comment on its significance.
The poster bore a message that read: “Radioactive fallout from nuclear detonations have passed over these areas more than 2x since 1951.” The map itself closely resembles research by Richard Miller, who documented radioactive clouds drifting across the U.S. during Nevada nuclear testing between 1951 and 1962. Its presence has left investigators and the public puzzled, raising questions about whether Jahn was attempting to make a political or activist statement unrelated to the ICE attack.
Law enforcement has not confirmed whether the bizarre artifact ties into Jahn’s alleged anti-ICE stance or broader ideological leanings. Reports indicate that bullet casings recovered at the scene of the Dallas shooting carried the words “ANTI-ICE,” suggesting hostility toward immigration enforcement. Still, Jahn’s brother previously told reporters he did not believe Joshua was politically motivated, describing him as “unique” but not particularly interested in politics.
The revelations come in the aftermath of Jahn’s sniper-style attack outside the Dallas ICE facility on September 24, 2025. Authorities say Jahn fired “indiscriminately” at a transport van in the facility’s sallyport, killing two detainees and critically injuring a third before turning the gun on himself. His body was discovered on the roof of a nearby immigration attorney’s office, along with unspent casings.
The shooting has drawn fierce political reaction. Texas Attorney General Ken Paxton described it as an “attack on ICE and law enforcement,” while Governor Greg Abbott vowed to strengthen deportation efforts in the wake of the tragedy. The incident also follows a string of recent threats and attacks targeting ICE facilities across Texas, including a July shootout in McAllen and a bomb threat last month in El Paso.
For now, investigators remain focused on Jahn’s movements and state of mind in the days leading up to the shooting. Whether the radioactive fallout poster was a personal obsession, a symbolic message, or simply unrelated remains unknown. Federal and local agencies have promised more details as the investigation continues.