Snape's patronus

[whtwitch91]

No: HPFGUIDX 145576

I have a hypothesis that I have been mullin over for some time and 
am now ready to submit to the group.  We have the location of 
probably five of the horcruxes: the ring, the locket, the diary, the 
cup, Voldemort, and possibly Harry as the sixth. We know that 
Voldemort is working on the true immortality problem.  Immortality 
implies a truly aggless body or a younger host every few decades or 
so.  Suppose Voldemort has arrived at the latter conclusion, turns 
to his side and sees Snape, (a likely host with strong powers of his 
own), and by various means inserts a horcrux into him leaving Snape 
unaware of this new acquisition. I theorize it might have happened 
in the summer before OotP takes place.  It sleeps until activated. 
Possibly we have been looking at Voldemort in parts of Book 6.  
Suppose it isn't Snape intact killing DD on the astronomy tower, but 
Voldemort? Would that explain the expression on Snape's face?  Have 
we ever though Snape felt disgust toward DD? But surely Voldemort 
does - all that horrible goodness. Eventually Voldemort will 
transmit most of his personality into Snape and take over his body 
completely, but if Voldemort had control for that moment on the 
tower is Snape culpable in any sense of the word for the death of DD?

At this point the transmutation of the patronus becomes clear. 
Snape's patronus, whatever it was, becomes a snake. And if the 
member of the Order of the Phoenix see this, the game is up.

Unfortunately I am too concise so I hope this is clear enough.  
Incidentally I am new to the group and have only been reading it the 
last few weeks.  Hopefully this hypotheis hasn't been hashed out.

Sue