These audio clips come via RadioReference.com, which is an awesome service, I highly recommend that you go hit their tip jar.
Needless to say, these things are chilling to listen to.
Newtown Police/Fire
Response starts at the 22:45 Mark
(9:13 AM – 9:43 AM)
http://areg.radioreference.com/20121…41506-7623.mp3
Continues here…
(9:43 AM – 10:13 AM)
http://areg.radioreference.com/20121…82442-7623.mp3
(10:43 AM – 11:13 AM)
http://areg.radioreference.com/20121…88411-7623.mp3
Fairfield County Police, Fire, and EMS
Response starts at the 5:45 minute mark (9:34 AM to 10:04 AM)