No murder although death

[needhelp 1]

I was on DE2 today and a mate got sniped in Stary. Since i was nearby i started a search for the sniper and found him after some time. Unluckily i did not have fraps running.

Situation was as following:

I was 20-30 meters away with my MK48 and pointing towards his chest. He had no idea i was there. So i started unloading and hit his chest with 5-10 bullets (just wanted to get sure he can't dc).

So i see him fall (seemed like dead body falling, w/e, he MUST have been dead).

His corpse was gone (i instantly stood up and walked there), no blood, no flies, and no kill for me!

Is this some sort of cheat?

If there is some chance of investigation (which i doubt, i can't provide evidence and especially not the guys name since veteran 3dp:off), i can provide the name of my buddy. Time of the snipers death was pretty much 18:57 Berlin Time Zone.

The point is. If this is some sort of hack (the guy himself was a script kiddy max, probably less, for sure), then there is unluckily no sense in playing on a compromised server anymore. vet 3dp:off server is harder anyways, and when you have cheaters who snipe and are unkillable then this is just bs. Was not the first incident like this btw.

tl;dr

Read story for answer question if dead not being dead is cheat.