As part of the investigation, officials had contacted Morales Reyes and asked for a handwriting sample and concluded his handwriting and the threatening letter didn’t match and that the threat was not credible, the person said. It’s not clear why Homeland Security officials still decided to send a release making that claim.
Link: https://apnews.com/article/ice-letter-threatening-trump-21447adfd14eb1a043f95344f9ccb3d5