In this case you called a False Kos on Milk thinking he shot you but he didnt so he got killed over your false claim, In the video you clearly see when going up the stairs after you've taken the first shotgun shot that you look at milk and see him holding a G3 if not specific you would think its an Ak / Acr. Milk decided not to forgive you even tho it was an accident its up to milk to either "Forgive or Keep the report"