As it is, a citizen cannot normally charge a cop with a crime, so all legal recourse against the police must go through a civil court in practice, where the doctrine of qualified immunity acts as a shield
The person who pulls the trigger is the one who is the killer. The local government has no hands with which to operate a firearm's trigger.
Please be very careful not to misattribute or diffuse the responsibility for unnecessary violence carried out by violent, criminal cops.
Yes state is guilty too. But, seriously, you accept that death of innocent person in a raid is normal result of normal police behavior? Even if there is reason for no-knock raid, cops dont have to kill everything that moves.
If you are armed, it is a normal result to protect your home with force from such an invasion.
If the arrestee responds with armed force, it is a normal result that the police will do so as well.
If they do, it is certainly a foreseeable result that someone will end up dead.
By ordering a no-knock raid in the middle of the night, the mayor and police chief set up a situation where the arrestee's right of self-defense and the police officers' rights of self-defense are on a collision course.
You can't talk about justice in one breath and vengeance against the fall guy in the next. If a police officer unintentionally kills an innocent person because they were, e.g., ordered to perform an armed no-knock raid in the middle of the night in a state where 42.4% of the population owns firearms, it is the local government -- not the individual police officer -- who killed that innocent person.