A Race Against Exposure
Rear WindowThis thread traces the contest between Hal's attempts to expose the hiding place and Lars's efforts to silence the person watching him.
increasing
Bearing strength in each event
decreasing
Official Doubt

Official Doubt
A Thin Accusation
Hal has no eyewitness account, body, or physical evidence, only a pattern of suspicious behavior. Inspector Boyne's inquiries find a plausible account that Anna left for the country.
The Burden of Proof
The police cannot treat Hal's certainty as a substitute for corroboration. Their restraint frustrates him, but it also defines the evidentiary obstacle he must overcome.
A Search Finds Nothing

A Search Finds Nothing
The Flat Examined
Police officers search Lars's apartment while he is away, moving through the rooms and checking their contents. They find no incriminating evidence.
A Missing Location
Hal is not surprised: the trunk is gone, and he believes the body is elsewhere. The failed search increases the distance between his conviction and what the police can prove.
The Trap at the Door

The Trap at the Door
An Anonymous Question
Hal has Sam slide a note asking what Lars has done with Anna beneath his door. He watches through the Spyglass as Lars reads it and reacts with unmistakable alarm.
A Private Verdict
Lars's fear convinces Hal that guilt is real, but the reaction still cannot serve as reliable proof for the police. Hal becomes more certain while remaining legally isolated.
The False Meeting

The False Meeting
Bait and Countermove
Hal pretends to be a blackmailer and proposes a meeting at Lakeside Park. Lars agrees, then takes Thorwald's Pistol before leaving.
A Risky Opportunity
Hal's deception draws Lars out, giving Sam a chance to enter the flat and disturb its rooms. The maneuver is designed to provoke a revealing reaction, not to find the body directly.
The Silent Threat

The Silent Threat
Discovery and Pursuit
Lars returns, reacts to the planted disturbance, and Hal realizes his opponent may have identified the watcher. A wordless call and a purposeful glance sharpen the danger.
Confrontation at Home
Lars cuts the telephone line and enters Hal's dark apartment. The case becomes a direct struggle in which Hal's immobility and the darkness threaten to decide the outcome.
The afternoon after Hal first contacts the police
The first evening of the police inquiry
The day after Boyne rejects Hal's accusation
That evening, after Hal's first phone call to Lars
The final night, after Lars returns