I can talk about more "evidence", which is by comparing posting styles, time, local timezone (according to the two profiles), and come up with the conclusion that the two accounts share quite a few similarities, but that isn't concrete evidence to prove the connection, perhaps it's enough to suggest that there's one, but as I said, not enough to prove.
He has posted from his main account, thinking he was posting from his alt. I don't think anyone would believe that you would copy the link of a couple of posts for a review and submit them to a merit source without reading the content. Still, if that was one post, I would assume they did not check carefully and made a mistake. But we are talking about a whole set of application where he gathered half a dozen posts and submitted them for a review. I don't think this could be done by mistake. Also, what about the round number he mentioned in the post? It is clear case of abuse and the account is now already connected. I assume the DT members are waiting for something else. I think you know what I am talking about.