Oroborous
Rasputin was assassinated once. He died when it was over. This indeed, is the definition of assassination.Now, they did have to poison him, beat him, shoot him, drown him, and finally freeze him to death before it stuck.
But after giving him enough poison to kill 10 men, to no success, one of the would be assassins shot him in the head. He fell, appearantly dead.
The shooter went to report this to his colleagues and upon returning, found the corpse absent. The story goes on, leading into a colorful escape attempt by Rasputin, wherein he was shot several times, and again presumed dead, and thrown into a local river, which was frozen over. A hole was cut into the ice and he was stuffed down it.
When his body was discovered, drowning was determined to be the ultimage cause of death, and rigormortis of his frozen corpse captured his body in a position consistant with a man pressing upward against the ice...
My point being, at several points of that evenings events, Rasputin was presumed dead, by people well qualified to make such determinations. It is conceivable that any murder might fail, inspite of the would be killers care at insuring otherwise.
Aside from that, I prefer the model of RPG's as serial television, in terms of character mortality. If somebody is going to rub somebody's character out 'permenantly', they should make sure the other person is alright with that, and if they are not, they should commit the act in a way that creates some legitimate loophole for the victim to respawn within the confines of RP.
Thats just my opinion on that though.