Latency plays a big part of demos. I saw him where I shot. The blood was also to the left of him as well, or well technically his right.
http://img97.imageshack.us/img97/454/bloodt.png
I personally thought that you were talking about the kill before him -- I was like well I believe I got very lucky there. (tick 8100-8200 or so)
The reason the green body is there is because I skipped the "ticks" that I killed him and therefore it just placed his body at the exact point of where he died. (Just letting you know)