Interesting details at the link:
..... jurors told a judge it could not reach a verdict on any of the four charges against him.
..... Porter, 26, was charged with involuntary manslaughter, second-degree assault, reckless endangerment and misconduct in office.
If you can’t even get a misconduct or reckless engangerment charge, they’ve got nothing.
If they couldn’t even reach a verdict on an assault charge then there’s no way in hell any jury would convict on murder or manslaughter charges.