No one was charged with Taylor's death because her death is a justifiable homicide, not a "murder".
Again, keep the facts in mind.
Taylor was a rightly-suspected drug dealer. She was doing administrative and warehousing work for her ex-boyfriend, the boss of the drug-dealing enterprise. She held money and gave it to him, likely as part of the money laundering process. She received the drug packages and then handed them to the ex-boyfriend. The police knew this was happening. That's why they raided her apartment.
The police thus entered her apartment thinking she was a suspect in a drug-dealing enterprise. The police were mentally prepared for the presence of guns in such an enterprise, which are simply always present in drug-dealing enterprises.
So the police, when they were fired upon, quick, quick returned fire in the direction of the two people one of whom was holding at least one of the possible multiple guns that fired at them.
The current boyfriend then quickly hit the ground while the police returned self-defense fire, and with him on the ground, Taylor was left exposed, and was hit six times.
Remember, the police went in their suspecting Taylor of being a part of the drug-dealing, knowing what she looked like, and thus did not experience her as some innocent bystander or prisoner or the like.
She was a suspect and rightly so.
A gunfight broke out started by those on Taylor's side of the exchange.
That she was hit and killed is sad, yes, very .. nevertheless, had she not been engaging in the illegal drug trade she would never have been considered a suspect to justify the raid.
Thus her death is simply not on the police officers who were defending themselves in a quick, quick life or death situation.
Sadly, in truth, Taylor's death lies squarely .. with herself.