Disturbed boy or entitled male criminal caught early? Or bit of both?
It is very true that there is a problem with the 'adultification' of Black children especially ones who have committed crime in the US.
But my understanding is at that time his case will have been automatically 'direct filed' by a prosecutor to be charged and processed as an adult, because of the nature of two of the 'felony charges' (there's a 2nd home invasion crime) and Florida's tough stance on felony crimes. A white boy committing the same felonies in that era would have also been direct filed to be charged and treated as adult. Yes lots of racism at play, but not the reason he was treated as adult and sent to an adult facility.
Things have calmed down a lot from Florida's fears of a class of 'superpredators' emerging at a young age, and not all prosecutors direct charge young offenders into the adult system automatically any more, but at that point to the best of my knowledge they all did across 20 Florida circuits. Black, White, Hispanic made little difference, though yes he will absolutely will have carried the issues of racist attitudes as well as disgust as a home invading rapist as a young Black offender.
14 + Juveniles involved in gun lead 'home invasions' are to this day likely to be treated and charged as adults.
The juvenile system in Florida is aimed at rehabilitation, the adult system at punishment. That's how they run, and how they generally like it.
If a 14 plus yr old does something bad enough, they want it on the persons record for life, which treating as a juvenile doesn't allow for, as juvenile records are sealed in the persons mid 20's allowing them to start again.
Some felonies there including his, are seen by Florida as things you can't come back from, and they want their young perpetrators labeled for life, kept out of some professions, to have to do extra to be ever considered acceptable tenants in social housing (public housing) and prevented from future voting in Florida to keep things that way.
Then it was quite simple: commit certain crimes, get treated as an adult with loss of education rights, adult sentencing, and adult jails.
Removal of supposedly 'soft' prosecutors was a major issue there not long ago.