The claim is mostly true because multiple reliable sources confirm that Joshua Jahn, the Dallas ICE shooter who killed two migrants, left unspent shell casings engraved with 'ANTI-ICE,' indicating a politically charged motive, and his mother had previously posted anti-gun and critical comments targeting Texas GOP leaders on Facebook, though the exact nature and timing of her posts vary slightly across reports.
The mother of Joshua Jahn, the Dallas ICE shooter who killed 2 migrants, had previously posted anti-gun rants targeting Texas GOP leaders on Facebook. Jahn’s politically charged attack also left unspent shell casings engraved “ANTI-ICE,” authorities say.

Dallas ICE shooter Joshua Jahn who killed two migrants then himself, as brother reveals how he'd gone off rails - Daily Mail Online
Source: dailymail.co.uk
Key Evidence
FBI Director Kash Patel released images showing 'ANTI-ICE' written on shell casings found at the scene.
dailymail.co.ukdailymail.co.ukDallas ICE shooter Joshua Jahn who killed two migrants then himself, as brother...
independent.co.ukindependent.co.uk‘I’m sorry, I’m so sorry’: Suspected ICE sniper’s family breaks silence to...
Multiple news outlets confirm Joshua Jahn as the shooter who killed two migrants before killing himself.
dailymail.co.ukdailymail.co.ukDallas ICE shooter Joshua Jahn who killed two migrants then himself, as brother...
ibtimes.sgibtimes.sgWho Is Joshua Jahn? Dallas ICE Facility Shooter Who Killed Two Migrants Before...
Reports from The Times of India and Hindustan Times document Jahn's mother posting anti-gun and anti-Texas GOP leader comments on Facebook prior to the incident.
timesofindia.indiatimes.comtimesofindia.indiatimes.com'Failed Democrat parenting': Old post of ICE shooter Joshua Jahn's mother...
hindustantimes.comhindustantimes.comJoshua Jahn's mother's posts on gun laws surface amid Dallas ICE shooting probe;...
What the Evidence Shows
Joshua Jahn was identified as the shooter at the Dallas ICE facility who killed two migrants before killing himself, as confirmed by multiple sources including Daily Mail, IBTimes, and The Times of India.timesofindia.indiatimes.comtimesofindia.indiatimes.comWho was Dallas shooter Joshua Jahn, who left anti-ICE message in bullet? A...
dailymail.co.ukdailymail.co.ukDallas ICE shooter Joshua Jahn who killed two migrants then himself, as brother...+2 more
Authorities, including FBI Director Kash Patel, publicly shared images of unspent shell casings found at the scene with the phrase 'ANTI-ICE' scrawled on them, strongly suggesting a political or ideological motive behind the attack.independent.co.ukindependent.co.uk‘I’m sorry, I’m so sorry’: Suspected ICE sniper’s family breaks silence to...
the-independent.comthe-independent.comDallas shooting suspect Joshua Jahn found with ‘Anti-ICE’ message after one...+1 more
Regarding Jahn's mother, several sources report that she had posted anti-gun messages and criticisms of Texas GOP leaders such as Ted Cruz and Governor Abbott on Facebook prior to the shooting.timesofindia.indiatimes.comtimesofindia.indiatimes.com'Failed Democrat parenting': Old post of ICE shooter Joshua Jahn's mother...
hindustantimes.comhindustantimes.comJoshua Jahn's mother's posts on gun laws surface amid Dallas ICE shooting probe;... These posts have been described as 'anti-gun rants' and politically charged but details about their exact content and timing are limited.
While the core facts about the shooter’s identity, the politically charged message on shell casings, and the mother's critical posts are supported by multiple independent sources, some details such as the tone or extent of her posts vary slightly between reports.
No sources contradict these key points but some emphasize different aspects: for example, some focus more on Jahn’s criminal past or personal background, while others highlight the political context of the attack.thedailybs.comthedailybs.comTexas ICE shooter identified, here's what we know
ibtimes.sgibtimes.sgPICTURED: Gunman Joshua Jahn Who Killed Two Migrants at Dallas ICE Facility Was...
Overall, the claim aligns well with available evidence but should be understood with nuance regarding the mother's posts and their direct connection to Jahn’s actions.