I’ve always heard platonic attraction as a strong desire to form a deep platonic connection with a specific person. It’s wanting to be close with a person and form a deep bond, but no sexual or physical connection.
I think you’re just describing finding a person attractive vs being attracted to a person. I haven’t heard a term for it before.
Prosecutorial discretion is the real issue in most of these cases. If it were brought before a jury it could easily be argued that they tried literally nothing else before killing this person, so how could they reasonably believe anything? But it may never get to a jury because the DA might be a racist dirtbag who just decides to never press any charges.