Just because those jailers would be treated like serial killers if that happened doesn't mean that these guards deserve an equivalent treatment.
So then,how much responsibility should a jailer and their supervisory chain have for the health and welfare of a person in their custody? Some? None? Whatever happens to be convenient? This Marine was essentially jailed because he could not, or would not take care of himself. If you assert the authority to become his custodian under those circumstances, you assume certain responsibilities for him.