The unlawful killing without malice or intent. People kill each other in myriad ways that do not rise to a charge of manslaughter. You must know that.
They had a warrant, they were fired upon. At that point they were legally allowed to return fire.
All a manslaughter charge would have done is delay the anger from yesterday until the acquittal.
having a warrant doesn't absolve an officer of wrongdoing. The warrant was for the arrest of a person who was not there, based on wrong information. At the point that we realize the warrant is void, all acts by the police stemming from that warrant are also void of legality. In this case, a competent DA (not some Cameron) would charge these 3 men under manslaughter at the minimum, going as far as 2nd degree murder. Instead, they spent 6 months laying low before presenting a lot of documents that would portray Breonna Taylor as Jamarcus Glover's partner in crime. Yet the warrant still did not say that the police were there to arrest Breonna Taylor. The idea of Taylor as a criminal was a mere afterthought to protect the careers of three white murderers.
There is also the problem of the no-knock question. The officers stated they announced themselves as the police. Kenneth Walker stated that he asked who was there, and no one responded. So you have a question of proper procedure. Daniel Cameron has been trying to argue (strangely, as the prosector) that the police did announce and this was not a no-knock situation, which would absolve the police of wrongdoing. But why would Walker shoot if he knew they were the police? Why would the 911 call have Walker telling the operator that "someone kicked in the door and shot my girlfriend"?
The procedure and legality is not settled just because a guy who Mitch McConnell is very close to says so.