I didn't know he had been death matching, and the only evasion of that I'm aware of is the first time he was temp-banned, and I made sure to stop him re-connecting to the server and telling him that we would be perm--banned if he did.
I apologies for his actions and will ask him about what has happened. I don't know what action you or other admins will take from here, but I iwll respect your decision either way. It's always annoying when you see a dmer and it ruins the server but I'm not aware of how excessive it was either time.