The little guy got too big for his .. well ... fake booties and thought he could get away with murder, literally. Thought he was invincible because the mindless media fawned over him and made him believe he was something special. All the while he's just a freak show that made for a good story. And now IS making for a good story judging by the coverage it's getting. If anything good comes from this, it'll knock him down a peg or two and bring that little brain and attitude back to earth. His athletics 'career' is finished. He'll be in a magazine or two for 'exclusive' babbling before going on the 'celebrity island'. Then the 'celebrity house'. Then a 'tell all' book before everyone's nonexistent attention span forgets all about him.
Non of this would've happened if the kid were more secure in himself. Mix pathological insecurity along with fake praise and you get this.