reporter: do you remember the first person killed on your street? the first one to get killed was the man on the bicycle on the left of my house. on march 6th there were more people dead. 7 people dead on march 6th. 7 dead people. i couldn t capture all the bodies from the window. there was a wall in the way. reporter: what do you want to see happen to everybody in the chain of command? there must be punished. there was a young guy bringing potatoes to the bag. the stores were closed, no power, no heating, no water. he wanted to help, what does he deserve, only punishing. reporter: punishing the guilty won t be easy. there were a number of different russian units as i understand who were stationed here at one time or another. do you need to try to identify which unit it was, what the chain of command was? translator: that s very important to identify not only the commanders but the troops who committed the crimes and