When private citizens are allowed to do it (see e.g. Stand Your Ground states, Trayvon Martin, &c) it's also bad. Only without body cams, without even the possibility of institutional reform.
Not for the purposes of the law, nor their employment. The state has much more power in how to bring them into line than it does for private citizens (it just chooses not to use that power in the US).
Not when they're off the clock either, interestingly. An off duty officer still obeys the reasonable officer standard for use of force rather than the reasonable person standard.
