In the interest of those who are interested in the dealership execution incident, the Ministry of Defense of Russia took to telegram a couple of days ago to deboonk the claims that the Russians would ever, ever kill a civilian.
Now, while the Russian MoD raises some good points, like the outdated armor not currently in use by the Russian regulars, "tank special forces" (seriously, what?) and the date being cropped, faking something like this isn't easy so I'm reticent to believe them, personally.
PS: Someone mentioned the possibility of this being separatist troops, but no separatists were ever anywhere near Kiev.