Oh yeah...there is evidence that the two men knew each other before. They were bouncers at the same club. Maybe they had an argument back then that was never resolved.
So this may not be the quick closure everyone seems to want. It will take investigation.
Then that becomes open and shut deprivation of civil rights under color of law. A Federal Felony.
The issue is that the government loves to jerk off in public about "The Process is the Punishment"
(See Lt. General Flynn,
railroaded by the FBI
and now a Federal Judge openly breaking existing and established Federal Circuit Court Precedent
-- thereby arguably destroying his own judicial immunity
(and yes, I know the difference between qualified immunity and judicial immunity)--
in order to try to keep prosecuting him
even after the government admitted hiding Brady material,
falsifying prosecution documents,
pressuring him to plead by illegally threatening to prosecute his son,
and the dropping the charges.)
But when a government actor KILLS someone, they are not only shielded from sentencing, but even from the process.