AI-Generated 'Cat in the Hat' Threats Trigger School Lockdowns and Arrests
AI-generated images purporting to show a serial killer dressed as the Cat in the Hat character spread on social media starting in August 2026, prompting police investigations in Ireland and the UK and triggering school lockdowns in the United States. Authorities confirmed the images were fake, but the hoax continued to circulate, leading to arrests of students for making related threats.
What happened
Reports of someone dressed as the Cat in the Hat character first emerged on Snapchat around August 18, 2026, with claims that the figure was a serial killer. Images and videos spread across social media platforms including TikTok, Facebook and Instagram, with posts claiming the person should be avoided at night.
Gardaí, the Irish police, investigated the reports and determined that the images were AI-generated and that there was no actual Cat in the Hat killer. Despite this official finding, new AI-generated videos and images continued to circulate online, and some people began creating real costumes to perpetuate the trend.
Reported impact
The trend spread from Ireland and the UK to the United States, where threats related to the trend prompted school lockdowns. A student in Kentucky and another in Colorado were arrested in connection with Cat in the Hat-related threats, with reports indicating the trend was causing alarm nationwide.
Index analysis
The hoax appeared to be inspired by the 2003 Mike Myers film The Cat in the Hat, whose screen-worn costume was recently put up for auction. The trend drew comparisons to the 2016 creepy clown phenomenon, which similarly involved fake sightings shared on social media that prompted school closures.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.