Okay, I have never EVER been a fan of interparty conflict. I'm usually from the "Can't We All Get Along?" philosophy.
Last night in our regular game, our party had just escaped from a space hulk full of tyranids. We made it off the hulk in a jury-rigged and abandoned Thunderhawk gunship and exhausted our fuel escaping from a rift in the warp. We set our rescue beacon calling out on all channels and eventually get picked up by an Inquisitorial frigate.
My character is a Cleric. I'm a devout follower of the Imperial Cult and I'm also a Noble.
Another character in our party is a Guardsman from a feral world. He doesn't really give my character a lot of respect and sees me as a weak coward due to my lack of close combat ability. In several prior situation he has commented on this, although he seems to appreciate me enough to have saved my hide once or twice.
.....anyway, We land in the frigate docking bay and are met by a platoon of 30 Naval Guardsman and a man stating he is an Interrogator in the Inquisition. He also tells us we are under arrest for heresy and will face the possibility of dying as traitors. The fact that we arrived in an abandoned and jury-rigged Thunderhawk may have had something to do with that, but we can't really be sure what his motivation is for declaring us heretics.
So, at this point, I'm thinking most of what the Interrogator said is bluster. Once in custody, we can explain the situation and talk our way out of it. My character is a Noble, a Priest of the Imperial Cult and an Acolyte in the Inquisition. I'm also quite adept at both the Charm and Deceive skills. Our feral guardsman character is not under the same impressions as I though. Nor does he have any faith in my ability to talk us out of trouble.
When the Interrogator has the ships guardsmen try to take us into custody, our guardsman attacks and then lobs a grenade into the midst of the platoon.
In the chaos following everyone still alive runs. The interrogator escapes and we are in pursuit. Some of us want to surrender and explain the situation. Our guardsman contents himself with slaying every 'enemy' around him with a giant axe as if he were a lumberjack felling trees.
It's described to the rest of the party that he's gone berserk and looks "somewhat" like a man possessed.
Anyway, after following this guardsman on a trail of destruction with him NOT listening to any sort of talk of giving ourselves up for questioning. Plus, based on his body count, I'm not too sure that's an option for him... or us anymore based on our association with him.
What it comes down to is this... He wouldn't listen to words. I can't best him physically..... So I shot him at point blank range in the back with my Hellpistol to get his attention. I knew full well, 1 shot would not kill him (unless I critted), but it might get him to stop for a moment.... even if it was just to hack me to pieces.
Was I wrong for doing this? Should I have shot a fellow party member that wouldn't listen to reason?
How would others have handled this?
Frankly, I felt like a Commissar for doing it. We did find out afterward that he distrusted the Interrogator and fully assumed we would be killed...so he decided to fight for his life and ours like a caged animal. I felt like I had betrayed someone in the party who had saved me in the past. While we have differing opinions, we are all on the same side.
A quick note: In the end, we did surrender, were tried and convicted of heresy and were saved at the last minute from the firing squad by our Inquisitor's retinue.