Well, he clearly owns the copyright on the photographs, so if anyone wants to contest that they are SOL. The privacy concern is legitimate if and only if the pictures were taken in an area where there was an expectation of privacy. A sporting event with people in the stands cheering certainly doesn't seem like a private event...
Does he? Who's equipment did he use? His own? the schools?
If he used his own, then yes I'd agree he fully owns everything, even if he was using his equipment on behalf of the school newspaper/etc.
But if he used the school's (except by permission for his own personal use, etc), then there's a case that could be made that the school owns the work. It's harder since he likely wasn't PAID for it (which is typically required) but the case could be made.