@force Hi Force, official admins can only enforce rules on official servers - the profile you linked is not of an official admin. Non official servers, meaning every server that doesn’t have Official at the start of the title, can have anyone they want as an admin and can enforce their own rules.
I also don’t know of any command that can kill/damage someone in the server, and to my knowledge none exists.
If this was an official server then this person is just a player, however if you could send me the server name and reply via PM that would be appreciated.
In the future you can use http://www.tornbanner.com/contact/ if you feel an OFFICIAL admin has abused their power. If you are not sure who the current official admins are then you can check here, anyone with a star next to their name is an admin.