I 100% think these people and anyone else who "SWAT"s should be severely punished, but at the same time worry they may be used as scapegoats to draw attention away from the excessive use of force of police.
I'm not worried in the sense that I think these idiots will be punished too severely (they SHOULD be punished severely), just in the sense that I don't want having them as scapegoats diminish asking questions about why police are so often killing innocent people (regardless of how the situation in which the killing was done happened to occur).
If by 'scum like this' you mean the over militarized, over aggressive police who always escalate situations so that they can put on their battle jammies and act like they are in Fallujah then I completely agree with you.
Why do they approach assuming guilt? It shouldn't be this easy to get people murdered by making false claims.