I’d like to read a novel or three about someone playing cat and mouse with a killer but the character who isn’t the killer shouldn’t be in law enforcement on any level or in the military. This civilian ought to be the driving force between capturing or otherwise stopping the killer, too.
Without law enforcement characters, I guess that leaves:
- amateur sleuths (but not PIs, please)
- people who are trying to avenge one of the victims
- someone hoping to rescue a victim before it’s too late (like in Mine by Robert McCammon)
- “ordinary” people who are roped into stalking supernatural killers of some type (urban fantasy plots are acceptable)
- potential victims who turn the tables on the killer and somehow hunt him/her instead
I don’t mind if they work with the police/FBI/CIA/MPs/private investigators as long as their cooperation doesn’t constrict them too much i.e. forcing them to only act within the confines of the law, and they’re still the one you’d credit with stopping the killer.