Most states, very understandably, are hesitant to pass “Good Samaritan” laws. Such laws, in theory, would make it a crime to fail to assist someone, even though you did not cause any harm to them. But the failure to have such laws can lead to frustrating results at times.
For example, in a recent case, a group of teenagers taunted and failed to help a drowning man, who ultimately died in a situation in which they could have saved him. The teenagers are unlikely to face any charges.
States legitimately do not want to pass “Good Samaritan” laws because of the possibility of them being overused or abused, but it still is hard to accept the outcome of cases like this one. See an article on the subject here.