We did it again

Hello there! It happened again...
I am Kallemera and I did some world pvp in Darkshire and this npc called "Herbie Baubbletump" stood there so my friend Sank decided to kill him since he did not have a civillian mark. When he killed him I noticed that I got a disshonorable kill. I am ranking in pvp at the moment so this is not a very good thing for me.
Here is the screanshot of the combat log and of the target: http://i.imgur.com/FDWmJO5.jpg
This is how a Civillian looks like: http://i.imgur.com/GrGtSRn.jpg
"Dishonorable kills are a part of the Honor System. You gain DKs by killing opposing-faction Civilians NPC during PvP combat."
Thank you in advance.
Kallemera
I am Kallemera and I did some world pvp in Darkshire and this npc called "Herbie Baubbletump" stood there so my friend Sank decided to kill him since he did not have a civillian mark. When he killed him I noticed that I got a disshonorable kill. I am ranking in pvp at the moment so this is not a very good thing for me.
Here is the screanshot of the combat log and of the target: http://i.imgur.com/FDWmJO5.jpg
This is how a Civillian looks like: http://i.imgur.com/GrGtSRn.jpg
"Dishonorable kills are a part of the Honor System. You gain DKs by killing opposing-faction Civilians NPC during PvP combat."
Thank you in advance.
Kallemera