Harry Potter and the Goblet of Fire - Wrong Murderer
It the book it says that Cedric came out of Voldemort's wand. This is incorrect. Voldemort didn't kill Cedric. Wormtail did. Voldemort just gave the order to kill him.
I can't believe I never thought of this before today. Sure, it's possible he used Voldemort's wand from Voldemort's robes and put it back, but it doesn't state it. Peter might very well not have had a wand. But since it never states it one way or the other, that is curious.