eerie

dark

creepy

mysterious

mystical

mystery

crime

crime in progress

criminal

criminal investigation

forensic

forensics

forensic investigation

spy

spies

undercover

under cover

police

police operation

sting operation

stakeout

hunt

hunter

hunting

suspect

suspicious

suspicion

real crime

true crime

ominous

foreboding

anxious

suspense

suspenseful

tense

tension

detective

private detective

disturbing

horror

thriller

chilling

ethereal

black

foggy

misty

shady

cryptic

enigmatic

obscure

disturb

chill