He could have easily removed them, there is no way to check unless you check while you think they are hacking. It has been a few days and those hacks could have been easily removed from the .minecraft files and put somewhere else.
I was not talking you to, I was talking to @Jschott204. But also you have no proof of checking his files and proving him innocent unless you recorded it or something. I suggest if you ever do check someone for hacks you record so you have proof they do not hack.I did check while he was hacking and he wasn't and I wanted to show Exit but he logged off before I could so -_-
Those are duplicate ban records, which is a glitch as of now. It was really two previous bans, which still warrants a permanent ban, since hacking on the second offense is a permanent ban.