The Evidence Against Lars
Rear WindowThis thread follows the clues as they move from ambiguous habits to a physical location and official confirmation.
increasing
Bearing strength in each event
decreasing
The Window Sweep

The Window Sweep
A Deliberate Survey
Lars scans the back windows in a slow arc, looking outward rather than staring blankly in worry. Hal notices that the gesture seems directed toward possible observers.
A Clue Without Context
At first, the behavior is only an oddity. Its meaning grows when Lars repeats the same cautious inspection after returning home.
The Trunk and the Drinks

The Trunk and the Drinks
Work Without Explanation
Lars packs Anna's dresses into a large trunk, then drinks. After the trunk is collected, he drinks again despite having no comparable labor to explain his agitation.
A Suspicious Sequence
The behavior does not prove a crime, but it resists Hal's first explanation that Lars is simply preparing a sick wife for travel. The trunk becomes a central object in the investigation.
The Postcard's Alibi

The Postcard's Alibi
Apparent Confirmation
Inspector Boyne tells Hal that a postcard from Anna says she has arrived safely and feels better. A blurred year on its postmark prevents a precise dating.
Doubt Remains
Hal argues that the message could be old or planted, and that no witness actually saw Anna leave. The postcard weakens his confidence without resolving the central absence.
The Height Difference

The Height Difference
A Visual Irregularity
Hal remembers a landlord and prospective tenant moving between windows in the upper apartment. Their apparent height relative to Lars changes when both reach the kitchen windows.
Architecture as Evidence
He realizes that the upper kitchen floor has been raised. A feature of construction, previously just part of the renovations, points toward the concealed body.
The Body Confirms the Theory

The Body Confirms the Theory
A Targeted Search
Hal directs Inspector Boyne to the cement kitchen floor in the unfinished apartment above Lars. The investigators break through the surface and find Anna.
From Inference to Proof
The body validates the chain of observations that official searches had failed to establish. Hal's deduction can now support a prosecution rather than merely a private conviction.
The morning after the all-night light
The night the trunk is packed and the following morning
The night after the first police search
Late in the story, recalling the afternoon visitors
At the ending, after the search upstairs