This mess in Florida is even more dirty than thought

There were FOUR RSOs at the school, none of whom did anything except hide, 'set up a perimeter' and wait.

The failure by the school and RSOs to actually do anything about this little bastard- and others- was planned and intentional.
That 30-minute delay in the surveillance video?
♦ Secondly, the 27-minute tape-delay in the CCTV system is not an "accident", "flaw" or "mistake". It is entirely by design.

As a standard Broward and Miami-Dade practice, when school law enforcement need to cover-up or hide behavior, they need time (when that behavior happens) to delete the evidence trail. As such, the school policy – as carried out in practice – is more efficient with a 30-minute tape delay affording the school officer enough time to deal with the situation, then erase the possibility of a recording of the unlawful activity surfacing.

Building in a 30-minute delay on the CCTV system was one of those pesky add-on items that happened a few years ago when the School and Law Enforcement officials established the policy of intentionally not arresting students.

With modern technology it's tough to hide criminal behavior, especially the violent stuff, when it is being recorded. Duh. Ergo the tape-delay was the best-practice workaround.
Throw in the EffingBI being too busy with important matters like chasing problems in college sports, and we get a bunch of dead kids.

'Missed warning signs' my ass, they were deliberately ignored.  Including by that chickenshit sheriff who knew about all this, and then went posturing on 'the NRA
's fault!' on tv.  Bastards.  Disgusting bastards, all of them.