The reason article states that a .357 was recovered after the mayhem, but I can’t see, doing a quick search, that a .357 was recovered. Other articles state that the police asked for the no-knock warrant because the informant saw a 9mm semi, but none of the articles I read said that one was recovered. Was it a .357 or 9mm? Was the informant lying?
Well, obviously there was a gun, because they were shot by the homeowners.
Also, obviously, their no-knock raid didn’t succeed at it’s intended function, which is to surprise the occupants so you don’t get shot.
The problem was they started by shooting the unarmed dog, instead of pointing the guns at the people and announcing “Police, hands up”.
They lost control of the situation.