As an detective and investigator of Cleveland, Ohio, you've been sent out to investigate the case of 3 missing people who have entered Helltown, of Boston Township. Inhabited by alleged satanists, insane, apparitions and even "mutants", there won't be any going back.
Just as a quick aside, though I realize this is a ridiculous nit pick, I figured I'd say it anyway.
Helltown Ohio, otherwise known as the Boston Township, is actually a tiny little community about 15 minutes from where I live:
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I realize the most major city in Summit County is Cleveland, so I understand that's why you picked it, but
technically *slides nerd glasses up nose* if you were to be authentic in your world building, the more actual location to which a local metropolitan detective would be even considering going to Boston Township would be someone from the city of Bath, Ohio and/or Akron, Ohio as those are the two closest cities that are big enough to actually have their own homicide units and not just require assistance from other places when spooky criminal activity goes down.
Sorry to be a huge loving dork about that, it was just weird being a local to the area.