As a surf Ex Head admin, I would say that both should be banned no matter what.
Chris, in this case you are kind of discriminating, because both of them killed in gunroom. However bebos found a reason for killing there (which is not authorized) and probably a poor excuse.
I recommend both players to get 1440 minutes(1 day) ban, and the admin for letting one get away with rule breaking, to get a warning.
No hard feelings towards anyone, just stating my opinion.

Regards,
Popay