I think he kills professor snape because he Volermort wanted Draco Malfoy to kill Dumbledore in the 6th film, but snape did instead so he Voldermort might of got a bit angry.
I don't know if that's right or not,
NO THAT IS NOT RIGHT (I WILL CORRECT YOUR ANSWER : BY (AHMED NASSAR)
I'm really sure that voldemort thought that snape disarmed dumbledore
but Draco did it
so voldemort thought that snape is the new owner of the elder wand.
so voldemort disarm and kill snape
OK, actually, THIS is why Voldemort Killed Snape (!!!!!):
In the Half Blood Prince, Malfoy disarmed (expelliarmus) Dumbledore, and Snape killed him. Whoever disarmes/kills the owner of the Elder Wand is the new owner of the Elder Wand. Dumbledore was the owner of the Elder wand until he was killed. Since Voldemort wanted the Elder Wand for himself, he figured that since Snape killed Dumbledore, Snape was the owner of the Elder Wand, Voldemort thought that if he killed Snape, Voldemort would be the owner of the Elder Wand. HE IS AN IDIOT!!!!!! THAT is the truth. ( believe me, I am the most obsessesd Harry Potter fan you will ever know. It is my JOB to know these things!!!)
Voldemort believes that Snape is the owner of the Elder wand - a wand that cannot lose in a duel - because he wants the wand.
The wand can only change masters if you dissarm or kill the previous owner.
Voldemort, of course, doesn't care about betraying Snape - who, as far as Voldemort knows, is still loyal to Voldemort.
Voldemort commanded his giant snake, Nagini, to kill Snape. The snake bit his neck and he bled to death.
Yes he does, in the very last book Voldmort is trying to get the elder wand, the previous owner was Dumbledore and you have to kill the previous owner to get it, snape kills Dumbledore and Voldemort kills Snape with his snake nagani. Right before he dies he gives harry a memory. This is his last act. Harry then takes it up to Dumbledore's office and looks at it. it explaines how harry is the last horecrux and how Snape loved harrys mother, lilly.
Voldemort ordered his snake, Nagini, to kill Severus Snape.
the reason why Snape killed Dumbledore was for Dumbledore not to protect harry so that Voldemort could proceed to kill him.
yes, snape kills professor dumbledor with the killing curse in the half-blood prince
=Voldemort Orders Nagini To Kill Him=
Yes he does, in the very last book Voldmort is trying to get the elder wand, the previous owner was Dumbledore and you have to kill the previous owner to get it, snape kills Dumbledore and Voldemort kills Snape with his snake nagani. Right before he dies he gives harry a memory. This is his last act. Harry then takes it up to Dumbledore's office and looks at it. it explaines how harry is the last horecrux and how Snape loved harrys mother, lilly.
Voldemort ordered his snake, Nagini, to kill Severus Snape.
Voldemort didn't know Snape had changed sides, Snape was a spy.
No, Snape's soul wasn't damaged, because Dumbledore had told Snape to kill him.
yes she did
cause dumbledor wanted snape to kill him
voldemort's own killing curse rebounded and hit him.
the reason why Snape killed Dumbledore was for Dumbledore not to protect harry so that Voldemort could proceed to kill him.
Because voldemort thinks that snape is the master of the elder wand but he isn't.
yes, snape kills professor dumbledor with the killing curse in the half-blood prince
yes!
He wants to kill him so he could be the "master of the elder wand" (except for the fact that Snape was not ever the master of the elder wand....)