I’ve heard alot that he is in Ratatouille. I don’t really no the names of the chefs, but I think it’s the guy with the big chin. 
[I killed a man, Wit this thumb.]
Sorry if this has already been posted.
Will Arnett does the voice of Horst, whom is the same chef you are referring to.
“I killed a man… with this thumb!”
Locking up… 
– Mitch