A gunman identified as 29-year-old Joshua John opened fire at the Dallas ICE field office from a rooftop, killing one detainee and wounding two others before committing suicide. The FBI recovered shell casings at the scene engraved with the words "anti-ICE." Family members described John as a unique individual without strong political feelings, while investigators look into how the casings were etched and whether specific individuals in the transport van were targeted.
