He captured a 72-second radio burst, 30 times louder than naturally occurring radio chatter from space.

A barrage of radio chatter floods into my headset.

In a recording of intercepted police radio chatter, which has also been posted, several snipers are heard taking orders and co-ordinating the firing.

Then intercepted radio chatter confirmed that he was in enemy hands.

But the record of police radio chatter, in which an officer reports gunfire 'inside the 1200 building' seems to contradict that statement.