[AndrewBissell]

There was an account on 8chan which would sign posts with "Q" and a unique hash which could be used to prove the identity of a particular person or group posting. Last I looked this account/hash hadn't been heard from in some time though.

[skindoe]

All the posts are viewable at Qmap.pub he posted less than 2 days ago. Encourage you to check it out.

[catalogia]

You say "he" but for all you really know any number of people could have knowledge of that tripcode.