Levi X Reader Oneshot(s)

So this is going to be a one-shot book of Levi X Readers.
The first one is going to be a Detective!Levi X Serial Killer!Reader. If you don't mind some horror, then please proceed.

I am also accepting requests. Please explain the situation that you want to happen in as much detail as possible so that I can fill out the request as best I can. I won't write lemons ... yet, but I will possibly do limes.