No, the only reason this individual is in court is due to...
... the facts that (1) his victim died, and (2) there is a vast amount of photographic and video evidence making it undeniable (though attempts were made).
If he had roughed-up a few homeless people, drunks, or rowdy youngsters down some back alley, and there had been little evidence, he would have got away with it. If he'd assaulted a few shambing pensioners for "walking along the pavement in an annoying way" and they hadn't died, he'd have got away with it.
None of us know if he's made a habit of being violent in the past, none of us know if he's mostly got away with it in the past, or if this is an (almost) one off, where by chance he happened to desert his post, happened to absent-mindedly remove his identifying numbers, just happened to cover his face on the same day when he had an uncontrollable urge to whack some shambling old git, and assault him from behind. In which case it's bad luck all round. Especially for the old duffer he killed, obviously.