We are told that it took 20 minutes for police to arrive on the scene at the Sandy Hook Massacre. We get this information from the CNN timeline posted by The Lonely Conservative who also thinks 20 minutes is a tad long for a 911 school shooting call.
But anyway, I did something really interesting: I used this thing called mapquest, and about 30 seconds worth of internet searching to obtain the addresses of both the school and the police station. I then entered these into mapquest to obtain a driving time between the two points. I know, I'm a real journalist that way. So I find that the police station and the school are only 2.14 miles apart, and it only takes five minutes to drive it, and I'm assuming the speed limit through most of that is 30 - 45 miles an hour. If they turned on the sirens and really moved, I think they could have managed it in like 90 seconds if they were really trying that is. Could be that they were all at the FEMA training going on in Bridgeport about 30 miles away that same day and time. The topic? Planning for children in emergenices.
Also food for thought is a local CT cop who has his own questions on the Sandy Hook situation: