The shooter put the victim in the situation he found himself in. If I get shot in the femoral artery and the surgeon tells me my leg must be amputated as a result of the blood loss to the tissues and I refuse to have it amputated and I lose my life the circumstance within which I found myself was the direct fault of the shooter not myself.
The brother who refused blood was put in that circumstance by the one who shot him and is as a result responsible for his death.