Was this linked from any of his existing social medias? Do we have any way of knowing it's actually him? I'd be just a tad cautious at this stage, given that the Substack page says it was 'Launched an hour ago' as of writing. The article, sure, dead man's switch, but the Substack publication itself was only created after his arrest?

Edit: also worth noting that whatever this is, it's not the document he had with him when he was arrested, since that apparently contained[0] the following excerpt, while this doesn't

> “These parasites had it coming,” one line from the document reads, according to a police official who has seen it. Another reads, “I do apologize for any strife and trauma, but it had to be done.”

[0]https://www.cnn.com/2024/12/09/us/unitedhealthcare-ceo-brian...