- The DKIM hashes of the emails on the laptop were verified.

- The pictures on the laptop contain him in it doing various illicit activities.

- His business partner came out against him.

- He won't deny its inauthentic, he said it "could be".

- There's a video of him talking to a Russian prostitute saying they stole his laptop and he's worried it'll be used to blackmail his father who is running for President.

https://github.com/robertdavidgraham/hunter-dkim

https://www.dailymail.co.uk/video/hunterbiden/video-2479077/...

https://nypost.com/2021/04/02/hunter-biden-says-laptop-at-ce...