Jesus hot sauce Christmas cake, this is fucking unbelievable.
— Mike

The Case Study Dossier is the twenty-seventh and final clue in the 1952 Clueline. It can be found by Mike in the Sanatorium, in Chapter 9 of Until Dawn.


The dossier displays multiple photos, showing some form of Before/After transformation of a miner patient in the Sanatorium.


Blackwood Pines

Blackwood Sanatorium                                                                                                                              

Medical Examination

Patient No. 9

Progression of Skeletal Hyperostosis


Jan. 9th, 1952

Day 4

  • Epidermal dyspigmentation; expected after time underground
  • Severe curvature of thoracic region; post traumatic kyphosis?
  • Corneal dystrophy and clouding.

Acuity 20/160

Jan. 14th, 1952

Day 9

  • Chronic kyphosisScarring alopecia
  • Extreme nasal septum perforation
  • Ectodermal dysplasia? (pointing of teeth)

Jan. 17th, 1952

Day 12

  • Telogen effluvium, not alopecia?
  • Maxillary canine length 1"
  • Consistent w/ corneal oedema but acuity now 20/22
  • Epidermal toughening; stratum corneum


Entering the hallway with the B-Wing sign over the arch, turn and walk into the foreground. Turn a corner and reach an open door on your left. Check the desk with the lamp inside.


  • This was one of the Wendigos caged up in the Sanatorium.
  • It is with this clue that Mike recognizes one of the Wendigos in the Sanatorium as Billy Bates.

Mystery Man Clueline

Wanted Poster · Newspaper Fragment · Answerphone Message · Axe Holder · Cigar Stub (Mike) · Mystical Symbol · Native American Book · Postcard · Cigar Stub (Matt) · Pig Head Note · Threatening Letter · Light from Below · Native American Letter · Cigar Box · Clippings Wall · Business Card · Pig's Head · Hidden Camera · Axe · Faked Newspapers · Lightbulb Catalogue · Batteries and Timers · Dead Pig · Photos of Friends · Hooks and Chains · Video Camera · Dummy in Sam's Clothes · Death Machine Plans · Josh's Cellphone · Remembrance Board · Voice Recording · Psychiatric Report

Twins Clueline

Film Trophy · Beach Photo · Prom Night Photo · Family Portrait · Tattoo Card · Compatibility Test · Tennis Photo · Portrait Photo · Hannah's Glasses Case · Beth's Phone · Hannah's Poster · Beth's Poster · Hannah's Glasses · Hannah's Locket · Marks on Rock · Beth's Cross · Tattoo Photo · Beth's Head · Beth's Watch · Scrawled Journal

1952 Clueline

Mine Danger Map · Old Mask · Administration Notes · Broken Camera · Medical Notes · Clocking-In Cards · Mine Rescue Photo · Old Newspaper · Restraining Chair · Telegram About Miners · Name Tag · Strange Skull · Death Certificate · Clocking-In Machine · Miner Photo · Miner's Family Photo · Romantic Postcard · Journal: Introduction · Journal: Cannibalism · Journal: History · Journal: Combat · Journal: Bite · Makeshift Graveyard · Doctor's Report · Old Film Reel · Suicide Note · Case Study Dossier

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