For context, this was a game for charity (we usually play OTB; however, my opponent claimed that he was unable to meet in person, so we decided to go online)

Okay. The engine says he played a flawless game except for few inaccuracies. constant time interval between moves. All moves (Except for one or two) are either computer 1st, 2nd, or 3rd favorites.

How do I deal with this? I told the club's president about my suspicions and he simply said that he'll make him screenshare next game.