While this may not be true, it is more than possible that the FSB could have staged Anna's murder, i.e., deliberately allowing video footage of the "hired gun" and then instigating the police shooting of Colonel Movladi Baisarov. This would tie the matter up quite nicely for the FSB even if the Russian public was unsuspecting anyway.
But I do not expect you to entertain this line of thinking, of course.
What you are saying may or may not be true. However, you can go back and check my posts where I stated Russians believe he was one of the suspects prior to his being gunned down. The video does not show Colonel Baisarov.
All I am saying is let's wait on the speculations and not rush to judgement.