Hey all, I've encountered a problem in my game of Deathwatch and thought I would come here for help.
In the current mission I'm running with the Kill-Team, they have been sent to investigate a dying Tyranid Hive Ship floating above a dead world. They were ordered by their Watch Captain to destroy the hive ship, attempt to find out what happened to the foolish Adeptus Mechanicus team that went aboard before them, and if possible, retrieve samples of living tyranid organisms for study. Upon reaching the planet, a member of the crew revealed himself as a member of the Ordo Xenos and has ordered the Kill-Team to return a Hive Tyrant alive to him for return to Erioch.
Now that you know the background, here's the problem...
The Kill-Team managed to capture the Hive Tyrant alive using a large number of Webs from the Astartes Webber in RoB, and currently have it secured and are trying to work out how to get it back to the ship. The trouble is one of the players doesn't want to take it alive. He says screw the Inquisition, he wants it dead, and he says this is his character's belief. This is perfectly within his right as he is roleplaying his character's desires. But the other 4 players want to return it alive, including the Squad Leader. But the player in question doesn't care and says he's going to do everything possible to kill the Tyrant. The arguing between them has increased, with the Librarian second-in-command and the Devastator threatening to kill the player in question for insubordination and mutiny if he tries to defy the orders of the Inquisition and the Squad Leader.
I was wondering if anybody has any advice as to what I should do to try and control the situation and to stop the arguing. Should I let the team kill the player if they really want? Or should I introduce an element or character to stop this from happening? And if I do let them kill him, what consequences should the remainder of the Kill-Team face for killing a battle-brother, even one who defied orders?