What does matter IMO is the fact that 6 kids got all the way to Rosen's house supposedly from the last classroom attacked and before police arrived (see Marilyn Gudsnuk on YT for her statement). That's at least 2 or 3 minutes just to get there. Maybe another 5 since the first shots were fired. So now we're up to 7 or 8 minutes before police arrived when they claim to have made it in 3 minutes. I don't think so and they're lying about the response time as well as the weapons used.