I don't think there has to be LOC to diagnose a concussion. I've taken care of plenty of people who weren't KO'd that were obviously suffering from a concussion. I pick option 1. How he is currently acting and looking is an indicator. Neuro exam, Observation, strict head injury instrucions and information about what to look for to his parents, must be woken up every 2 hrs during the night. Some might do a head CT, but he presents as alert, oriented and walking/talking. Not repeating himself,