Movies like Longlegs

If you're after Longlegs' slow-burn procedural tension and obsessive detective work, you'll probably find similar ground in Manhunt or The Long Shadow, which both build dread through meticulous investigation and accumulated clues rather than jump scares. There's a decent chance you'll connect with How To Catch a Serial Killer or Dark Figure of Crime if you're drawn to the psychological unraveling of investigators consumed by their cases—that claustrophobic sense where catching the killer becomes inseparable from personal torment. The procedural specificity in Homicide Hunter or Bones might scratch a different itch, trading occult dread for forensic detail, but they share that grinding accumulation of evidence that makes the hunt feel both methodical and suffocating.