my question is, a player is banned from cheating with his first acc.

how can you see with your second acc what your first acc is called?

it's about this player

https://battlelog.battlefield.com/bf4/de/user/fxnnN_X/

he has already admitted that he was banned for cheating with his first acc, in game chat at R´n´R server

Someone with acces to his IP may find the other account and link them, can you get the log from the RnR chat? it might be usefull..

 https://imgur.com/a/qsmSqM6  the admin just sent me a screnshot

I said to him, that his first acc was banned 

he on it, cheated earlier

and now clean