The problem that he will see is when he goes for a security clearance he will have to acknowledge this incident.
The other problem is AFROTC scholarships are very competitive and it is going to be hard to get a good rec from the ALO, with this hanging over him.
The ALO interview does count towards the WCS. The ALO will rack and stack the candidates, and if it comes down between him and someone else, they are most likely going to pick the someone else.
He just needs to be upfront and honest, because that shows he did an immature thing based on his youth, but wised up very quickly and now is being mature about his mistake.