Isn't the purpose of a "no knock" raid to ensure the safety of the officers when they are entering a dangerous situation (supported by intelligence of the situation) and not as a policy of all raids? My problem would be that there appeared to be no intelligence obtained on the house or occupants to support utilizing a "no knock" vs. normal entering procedures.
Also wanted to point out that there were more then just a few "tommy guns" in the 20's. Bonnie and Clyde prefered BAR's that they stole from local armories.
