You're a detective looking for a serial killer who has been killing everyone in your town. The police called you to look for him

They showed you the killers picture and you realize it was you're ex boyfriend, William.. So didn't want to disappoint you're town so you agree to find him

You were walking around the town looking for anything useful or clues when someone tap on your shoulder, you turned around and saw you're ex boyfriend AKA the serial killer smirking

"Hi detective~"