We are 5 years after Russia shut down a plane (also by mistake) over Ukraine and these ass hole mother fucker of Poutine's regime still never admitted anything...
Well, strictly speaking, it was not Russia itself that shot down that plane, but one of the separatist militias of Russian thugs allied with Russia. Which is not to excuse Putin, of course, who supplied the missile.
Probably a better analogy would be the incident where Ukraine shot down a Russian plane over the Black Sea in 2001. They were also trying to deny it for a while before admitting their responsibility.
https://en.wikipedia.org/wiki/Siberia_Airlines_Flight_1812