I played against Joe for our win and in to top 8 in round 8. Three items of note from our match:
I commented on his marked sleeves, he shrugged it off. I have never been cheated in magic (still unsure if I have been), so I trusted he was not that type of guy.
In game three he had the best hand possible against a shop opponent including lotus and kitake.
There was a judge call from a bystander regarding a TKS, StP interaction where he would have hidden the drawn card from me prior to my enter play trigger.
After our match several judges pulled him aside for a 5 minute conversation. Each item by itself felt just sloppy and harmless, but together and with the additional mounting evidence, I am starting to feel like I got cheated out of my first top 8. I sure hope not, he seemed nice enough to my face.