Very suspicious moves first he attacked me straight when I went to expand(which could be expected but it didn't have to happen), I played a game before that against him and I pushed him at t2, so he could expect the same thing in this game and maybe wait at his own expo.
But the more suspicious was that he refused to take screenshot 3 times and later on offered me that he leaves, which he wouldn't if he didn't use hacks as it was his win obviously.
red_blue mh.w3g
ps. Forgot to take the SS of that message but you have it in game a minute before end, I can make a screenshot from a replay if needed.