Char all the best to the friends, family and Justin.

I'm obviously not a doctor, but I would suspect when they say his internal time line isn't quite working, it is referencing some loss of memory. There really is no knowing if he will ever remember exactly what happened, only time will tell. I would expect the best thing to do is to encourage him in his recovery and not let him focus on the lack of memory.

Again, all the best and please let them all know your extended family is pulling for them.