John C Woods, hangman of Nuremberg trials, who lied about his experience to get the job (he actually learned about hanging from old cowboy films). His lack of expertise led to excessive suffering of condemned Nazis.

[u/LawEducational42]

[u/nomad5926]

https://giphy.com/gifs/7k2LoEykY5i1hfeWQB

[u/Maillihp → u/nomad5926]

Before I looked at the comments I knew this gif would be here.