Not with an arrest record at age 11. Medical school applications, state medical licenses, controlled substance prescription licenses, hospital credentialing applications, etc - all of the underlying bureaucracy of being a clinician (understandably) require background checks with clean records.
Unless his lawyer can get the record sealed and expunged, he'll most likely have to explain this event at every turn. One would hope that juvenile records could be explained away, but the field is so competitive that it could very well be the thing that keeps him from pursuing his dream.
All because a shitbag principal didn't want to deal with the requests of an 11 year old grieving his father and opportunistically punished him for it on the alleged word of another dumbass child's idea of a practical joke.
Even if he actually said it - he's an 11 year old, with a prefrontal cortex that is just starting to come online, on the hormonal cusp of puberty, trying to deal with the complex social dynamics of being 11 and changing schools, getting bullied about his haircut and clothes by a shitty adult abusing their authority.
I cant help but wonder how the situation would be if he was white.