The doctor’s death puts an end not only to the only realm of emotion and compassion that Murph could find during the war, but also to any sense of control he might have retained over his own life. If Bartle’s reaction is to handle the situation in a practical way, taking the woman’s body away, Murph’s only option is to abandon all hope of control once and for all. This is what leads him to escape and thus deliver himself to the enemy, putting himself in a position where he is almost certain to be killed and, thus, to escape his current suffering.