Graveyard Horcrux?

[pippin_999]

Double, double
Toil and trouble
Cauldron hiss and 
Cauldron bubble
Eye of newt and wing of fleas
Nothing will clean these dungarees!

Heidi:
 He couldn't have made one from Cedric as Wormtail did that killing.
And  Wormtail was the reason I had a problem with the horcrux 
concept,  unfortunately. Wormtail killed a dozen people in one blow, 
but even if  it split his soul, did he do any horcruxing?

Pippin:
More evidence that Pettigrew is innocent. He's another Morphin,
IMO, no saint, but not a killer, either. His soul is torn with
treachery, and cowardice, not murder.  So useful to have him 
around. By now, I'm sure Voldie has him quite convinced that he did 
murder all  those people and kill Cedric, too. But canon is ambiguous.

Wormtail held the wand, quoth Jo, but who is "Wormtail" ? Peter only,
or Peter and someone else? More than one Prince, more than one Evans,
more than one Crouch, more than one Riddle. The clues accumulate.

Heidi:
 Has Voldemort taught the  trick to any death eaters, and is that 
why they're so dangerous, because they kill other wizards to split 
their own souls? Or has he held the  information for himself?

Pippin:
I doubt very much that Voldemort would teach the trick to his
Death Eaters. No doubt he's promised them that he'll reveal the
secret of immortality once he's found it out, but in the graveyard
he makes it sound as if he doesn't know which of his
experiments saved his life, and as if he might be mortal once
more. Dumbledore confirms that the DE's don't know what he's
talking about when he says he's traveled further than anyone on
the road to immortality. I don't think Voldemort would want any
other immortal wizards competing with him. 

Pippin