Answer: a guy on Twitter claimed to have been a nanny for a classmate of Barron’s around 10 years ago. He has pictures of himself with Barron (in a group of kids). I haven’t seen any external confirmation of his connection.
This guy claims that Barron killed multiple small animals, slapped his nanny, and sexually molested other children. Even if he was a nanny of a kid at the same school as Barron, it could all be made up.
I googled.
[CW: alleged sexual abuse]
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