If it was the government doing the sniping, it would have been in the open, just a plain old assault. If you are the government, sniping random people from a hide, and then concealing that you did it, that doesn’t do much for you.
On the other hand, if you are the fascist elements of the Maidan movement, and you can snipe a few people you really don’t like anyway, you can get use it as a provocation, wave the bloody shirt, and inflame the mob.
See also, Ray Epps.
Another screen cap from the same video link...the trees showing bullet holes coming from the hotel were destroyed after Yanukovich was overthrown.