NEW: Bone-Chilling ‘Map’ Found Taped To ICE Shooter’s Car

Authorities believe Joshua Jahn, the gunman in Wednesday’s attack on a Dallas facility managed by U.S. Immigration and Customs Enforcement, left behind a disturbing handwritten map that only muddies investigators’ understanding of what motivated him to open fire from a rooftop.

Hours after Jahn, 29, was surrounded and took his own life, authorities discovered a blue Toyota Corolla parked not far from the site of the atrocity. On its right rear panel was taped a crude drawing of “radioactive fallout” and “nuclear detonations” that Jahn claimed were present over the area decades ago.

The homemade map appears unrelated to hatred toward ICE, a feeling that Jahn’s brother said he had never expressed prior to his death. Online voter records show that Jahn was a registered independent who voted in the 2020 Democratic primary and the 2024 general election.

He “didn’t have strong feelings about ICE,” Noah Jahn told the Daily Mail, adding he never imagined his brother would be the culprit in a politically-motivated mass shooting.

FBI Director Kash Patel said that authorities are working to uncover an “ideological motive behind this attack,” an assignment made all the more difficult by the indecipherable map found pinned to Jahn’s car.

A sign which appears over black splatter on a white background reads: “Radioactive fallout from nuclear detonations that’ve passed over these areas more than 2x since 1951.”

According to the NY Post, the map appears to be one derived from work by Richard Miller, a nuclear researcher who had written about the convergence of nuclear clouds produced by government testing in the Nevada desert in the 1950s and 60s.

During a press conference, FBI Special Agent in Charge R. Joseph Rothrock revealed that bullet casings found by Jahn’s body contained anti-ICE messages, further mystifying investigators about what motivated the unemployed coder to go on a killing spree.

“What I can also tell you is that early evidence that we’ve seen from rounds that were found near the suspected shooter contain messages that are anti-ICE in nature,” he told reporters.

Social media posts by Jahn’s mother suggest she is a hardline liberal who frequently targeted GOP members of Congress following mass shootings, according to the Daily Mail. A trail of messages reviewed by the Daily Mail shows that she followed everyone from Kamala Harris and Rachel Maddow and railed against Texas Republicans, especially after the 2022 shooting in Uvalde.

“Governor Abbott, Senator Cornyn, and Senator Cruz, how does it make you feel that your action to open up gun laws is responsible for the killing of 21 more people? Do you secretly sit in front of a tv and smile a demented smile? You must be proud of all the money that sits in your bank accounts from gun lobby support. Was it worth it, Governor Abbott? How about you senators?” she wrote at the time.