1) McCoy is the type of person who is involved with ethics in a way that can benefit the entire group, he rationalizes his decisions by his ethical knowledge. Although yes McCoy did do something wrong. He ignored the fact that there was a dying man in front of his feet, and he refused to care for him more than he had already. This wrong decision was created due to his belief in Group Ethics and not Individual Ethics, he refused to think harder at the matter and simply believed in writing rather than common sense.
2) McCoy's decision can be justified by a few reasons, in that he used his knowledge of Ethical Decisions to avoid Ethical Lapses in the matter. McCoy had actually shown a central force that affected his decisions into the matter, he was following the force of "Distancing from Responsibility" As he was trying to not get too personal with the decision at hand, this can be both a defense argument and a flaw. McCoy had developed his knowledge of avoiding ethical lapses. He introduced his ethical education into the matter which made it easier to come up with a fair decision. He also was trying to Lead by example to the others with him on the trip so that no one could jeopardize their activity.
3) This is an example of an ethical decision that is morally wrong, it is where the person thinks of himself rather than the individual, this falls into the Second Stage of the Moral Development. The preconventional stage, Stage two: Individual instrumental purpose. This is where the person determines what is right or wrong by making actions that best serve their needs or wants. If the Sadhu had been a beautiful woman for instance, McCoy would have immeadiatelly stopped and helped because he believes that helping a woman would gain him a reward or would make the woman fall for him at some point. However that should not matter at all, an individual is an individual whether an old man, a child, or a woman, none of that should matter in