It's a slightly different case, but look at what happened last time Russia shot down an airliner (https://en.wikipedia.org/wiki/Malaysia_Airlines_Flight_17): the perpetrators weren't exactly judged, but they got "disappeared", which is a form of punishment. For comparison, when the US shot down an airliner (https://en.wikipedia.org/wiki/Iran_Air_Flight_655), the perpetrators... got decorated.