A possible Horcrux

[Angela]

No: HPFGUIDX 138314

I've been thinking about the Horcrux mystery and perusing the pages of 
COS for ideas.  What about the award for special services to Hogwarts 
that was given to Tom Riddle for his part in catching (framing) Hagrid 
as the one who opened the Chamber?  It was mentioned several times in 
the book and it might be an important enough link to Hogwarts for LV, 
but of course my question is could he have killed someone to perform 
the spell and create this object as a Horcrux?  And who would he have 
killed?

Angela