Why do people join the police?
Not for cases like this... yet once an officer gets that 'spooky' label for a theory out of place, it's hard to avoid being handed them.
A neat little tale, that - like all the best mysteries - leaves you wondering just what the truth actually is!
For the role-player: If you run a police procedural, this might be fun to toss in. If you run urban fantasy, there may be something behind it all...