While I want to agree with the 'give the facts time to come out' I cannot think of a reason to not go in ASAP. This was never a hostage barricade, this was a barricaded active shooter. As long as he has access to additional victims and he is preventing you from obtaining medical treatment for those he shot then you still have active killing going on.
It depends on what was going on. It’s the hunting of additional victims part rather than those who are bleeding out that would say it was or wasn’t a barricaded hostage situation. For example, the Pulse nightclub shooting became a hostage situation. And victims bled out.
Did this “ chief” know that the kids that were still alive in that room only because they were hiding? Or did he believe the gunman was holding them?
When were the victims shot? In the beginning or was it during that 40 minutes of waiting?
Was the gunfire that killed those kids mistaken for gunfire at the cops and why?
More information is needed like that story of a cop shouting “ does anyone in there need help”, a little girl answered and got shot. Could that voice have been the gunman instead pretending to be a cop? It’s happened before. If it was the gunman, all the more reason to go in but it shows how the information we are given is tainted and still needs to be sorted out.
Was the “ chief” the initial coordinator, among the first to respond or did he come in later?
More info is needed. The true decision maker was those cops who engaged first and the decision not to press the attack