Whether or not this act was “murder” is for a jury to decide. It sure as Hell wasn’t an accident. The gun didn’t just go off. It was, to a certain extent, premeditated. He had to unholster his weapon, flick off the safety, take somewhat of an aim and pull the trigger. In any case, he ought to fry. More is expected of a “cop” than to be so reckless and indifferent. The vaunted psychological, legal and procedural training sure didn’t stick.
Not fry, sentenced to life without parole with “tiny” and 99 of his hiv positive best buddy jailmates, as a deterrent punishment for cops with overly developed authority complexes.
You are presumably cognizant of the need for a deterrence aspect in that administration of justice. Deterrence is a necessary component of the law. Without adequate deterrence, lawlessness prevails.