help?

ok i need your guy's advice

im writing a story for english class
and its about a group of detectives trying to solve a bunch of random murders that take place in this tiny town
and they cant find any evidence and there is a murder every night.
so they decide to get the help of this guy who has been in a mental institution since he was 15 because he murdered 3 people, and the judge deemed him insane. (even thoguh in actuality there is much more to the murders than he let on and hes actually insanly smart)
so the detectives make a deal that if he helps them solve the case, hes let free and all his criminal records will be erased.
oh and this story will have many mcr references xD
anyways..

my problem is i need a name for the story and i have no clue what to call it. any advice?