“Arrested the offender”, according to Miami-Dade Schools? What do they expect to do with him, charge him as an adult? He’s a child, too, isn’t he? And if he’s an adult, what’s he doing on the bus as a student? And what about the second, smaller kid? What did they/are they gonna do, “arrest” him, too?
What they need to do is haul the kids’ parents in for some firm questioning, as well. Practically no kid who’s been parented properly would ever do anything like this. At the same time they are tending to the girl and nursing her back to as close to 100% as possible, authorities also need to get to the bottom of why these kids thought it was OK to pummel this poor girl and work them through that, so they can try to salvage their lives. I would hope authorities wouldn’t just throw them in the can and throw away the key, which is what a lot of readers would think being “arrested” leads to, and probably what a lot of viewers of the video would like to see.