Patient removal from the warm zone

https://twitter.com/FireInfo1/status/1088193851200864258

for the Boston Marathon incident - BPD basically used 1 radio channel

for the Pittsburgh synagogue massacre - PPD basically used 1 radio channel

for the Parkland High School incident - how many radio channels were used?

for the Las Vegas incident - how many radio channels were used? (we
know it was more than 1 because the 1 cop who figured out where the
perp was at had to switch to a 2nd channel to reach a dispatcher)

is this relevant?

would the death tolls have been lowered if more radio channels were used?

just wondering - for an enemy