People Closing Game Down during fight.

[zaebis03]

Deleted.

[Likeaboss]

best thing is, if you have shadowplay or something, to clip that and send to a GM...

Problem is, as you did, call the Shamans name here in Forum is little kind of nameshaming, at least some GM could call it like this... maybe he just had 2 sad crashed and now you have pilloried him.

[Jambalaya]

Scores on deathblow addons are very important to some people

[Stophy22]

xD this happened to me with untold amounts of witch hunters. Just record your gameplay and compile it into a video

[Glorian]

If they crash their client there was a mechanic so you still get the kill and RR. Although thre are some other ways to go out of game without any of that.

So like the others said.
Record it, send it to a GM.

[DanielWinner]

No name shaming.
Contact GMs.