It’s a stark and alarming trend: Mass shooters engraving bullet casings with cryptic messages, leading officials to speculate about their motives and, more recently, their political affiliations.

It happened in Dallas on Wednesday. Officials investigating an attack on an Immigration and Customs Enforcement facility that killed one detainee and critically injured two others announced that they had recovered unspent ammunition, with at least one labeled “ANTI-ICE.”

This morning just before 7am local time, an individual fired multiple rounds at a Dallas, Texas ICE facility, killing one, wounding several others, before taking his own life. FBI, DHS, ATF are on the ground with Dallas PD and state authorities.

While the investigation is… pic.twitter.com/SMOyxiKLqA — FBI Director Kash Patel

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