Can a ban on Chess.com be unjustified?

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DumleErKjempeGodt
So there is a story behind this lol. TLDR at the end.
Basically me and my friend played some games against eachother, couple of weeks after the match he made a new account and I notice his old is banned for "fair play policy" this makes me think he might have cheated, he denies this of course and said that he doesn't know anything about it.
As we started wagering alot of money at the end this has made me question the loyalty of my friend.
I am also really suspicious because I looked at all of his normal 10min each games and he has 96-99% accuracy every game, even on the new account but thats just against me.
Is there any way this ban could have been unjustified?
TLDR: I believe my friend might have cheated, he denies it. Need to know if there is any way I can confirm or deny this theory.
The banned account:
Krish_nair

the ban can be also imposed if the person abandons the game in between and  also by disconnecting when he lost rather than resinging or getting checkmated

Krish_nair

Mostly probably it because he used a bot !

gphiahstna

Well I looked at my games that I had analyzed and I average an 80% accuracy rate and I even have some games real low around 20% and only a few that are above 90% My rating for 10 minute games is 1800+ Your friend is about 1200 and you said he has a 96% or better accuracy rate? I would stop playing for money against him if I were you 🤔

DumleErKjempeGodt

Okey, thank you for your help