They could start by verifying the address of the house they're raiding. Way too often this doesn't happen and the police murder someone because they got the wrong house. They should identify the occupants of the house. The victim in this case had been swatted before and he had already warned the police that could happen. The swat team should have been skeptical going into this situation and taken the time to verify what was going on first. The call they got in this case claimed to be from the victim who said his father had shot his sister and he was hiding in another room. Even if the 911 call had been legit, the police would have shot the person who called for help and not the father, because they didn't bother to identify who they were shooting or who else was around when they sprayed bullets around the room from outside. They should have identified themselves as police. There's no reason not to. They should have at least attempted to use their big boy words before they started shooting up the place.