The Witnesses' Discovery
Dr. DeathThis flow follows the staged discovery that lets Burke participate in his crimes while appearing to be a helpful bystander.
increasing
Bearing strength in each event
decreasing
The Seattle Hiker

A Useful Stranger
A Body Found
A hiker named Ferris Grant reports finding Marissa Bonpaine in the forest.
A Minor Detail
The report records his dog and his casual explanation, but investigators do not pursue the witness further.
The Los Angeles Hikers

A Familiar Role
A Couple at the Scene
Paul Ulrich and Tanya Stratton say their dog drew them to Mate's van.
A Convenient Presence
Ulrich's story places him close to the crime while making his presence appear accidental.
A Car That Wasn't There

The Imagined BMW
A Supposed Sighting
Ulrich tells Alex that he saw another dark BMW parked near the scene.
A False Trail
The detail encourages suspicion of Richard Doss before Alex discovers Ulrich's own identity.
The Sunrise Glare

A Physical Contradiction
Reconstructing the Scene
Milo checks the light and sightlines around the van.
A Witness Exposed
The glare makes Ulrich's claimed view through the rear window doubtful, reinforcing Alex's suspicion.
The Performance Ends

The Witness Revealed
A Familiar Face Hidden
The mustache and careful disguise initially prevent Alex from recognizing Ulrich.
No More Innocent Bystander
The discovered bag and Fusco's shot expose the supposed witness as the killer.
During the investigation of Marissa Bonpaine's death
The morning Mate's body is discovered
One week after the murder
The morning Milo revisits Mulholland Drive
At the Malibu cabin