1. __EliteGamer__.
2. Unknownkid8000.
3. Hacking. (Kill Aura)
4. Evidence / Screenshots:

If you look closely, you'll be able to tell the kill aura. At 5 - 12 seconds, you can easily see the kill aura - From at close look.
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Nice nametags you baddie

 

I use Optifine 1.7.5.

http://prntscr.com/525kpx

 

@larrythebird101

 

I see no hacks here. You were moving your screen a lot.

 

Have a look at the bow. He hits me when he uses it.

 

Ethan was hitting you too.

 

Just re-watched it, he tried to hit me, after Unknown had killed me.

 

I am not 100% sure on this.
However, I will notify a more experienced Moderator/Staff to look at this.
@ScoFu13 @Glaadiator

 

No hacks were shown.
Closing.