common sense shouldn't be law, but I guess it was necessary

You better make sure that the person is who you say it is. I don't care how certain you are after looking at the weight and height, you need to check and double check and ask someone else to check. This doesn't need to be a law, this is common sense. If you have two girls of similar characteristics in a crash, one dies and one in coma, you check and recheck. It doesn't have to be on your job description. The medical examiner who made the error should be fined or docked pay or something for such a careless error.