Characters!!

[PAUSED]
It was just a regular case for the BAU, study the criminal, Create the Profile..Catch the killer. It was as normal as you could get at the BAU until an international Killer left a letter for Agent David Rossi... A letter that looked to be written by a profiler, or perhaps a killer trying to catch themselves? What will the BAU do when they meet it's writer?

Disclaimer- I'm just writing this for fun like alot of my books so It might not be finished but regardless I hope you enjoy!