Wow, this reminds me of a Mafia movie. The hitman is so mysterious, and so...deadly.

"We shall not go into too much unnecessary detail of what become of the poor fellow’s skull and brain matter, but we shall remain comfortable knowing that the deed was done."

Please do go into the details. The details are the best part! Other than that, great story, maybe elaborate a little more in some places, but an excellent job nonetheless.