The Neighborhood as an Information Network
The Mystery of The Invisible DogGossip, package deliveries, work schedules, and routines circulate information through the apartment building and inadvertently enable both investigation and crime.
increasing
Bearing strength in each event
decreasing
The Manager’s Network

The Manager’s Network
Information gathered
Mrs Bortz knows who eats frozen dinners, how much cat food Hassell buys, and when tenants leave. She gathers details through questions, observation, and even rubbish.
A double-edged habit
Her invasive knowledge makes her unpleasant, but it also illustrates how much information is available to anyone who watches the building closely.
The Dog Rumor

The Dog Rumor
A misunderstanding spreads
Mrs Bortz learns that Prentice expects a Hound and tells neighbors he is getting a dog. Gwen Chalmers hears the rumor and misunderstands it too.
A partial warning
The information identifies a coming object but not a crystal sculpture. Gossip spreads enough to create opportunity without giving every neighbor the full plan.
A Package in Public

A Package in Public
Delivery becomes spectacle
Mrs Bortz hands Gwen Chalmers a mailed box and watches her open it. Alex Hassell also pauses nearby, while the camera records the scene.
Exposure of routine
The courtyard provides many observers and little privacy. The same visibility that makes the attack public also gives the investigators a record of who was present.
News Travels Fast

News Travels Fast
A chain of reports
Sonny Elmquist says Mrs O’Reilly told Mrs Bortz about Jupiter Jones’s encounter, and the story then reached Alex Hassell and Elmquist. News moves quickly through the building.
A clue about access
The chain explains how residents learn about each other without entering apartments. It also warns the investigators that their own actions will not remain private for long.
A Tip Passed Along

A Tip Passed Along
Unintended disclosure
Elmquist may tell Murphy that the Carpathian Hound is being delivered, after learning the detail during a wandering episode or from neighborhood talk. Murphy recognizes the opportunity.
Information becomes motive
The case shows that casual knowledge can enable a crime even when the person who passes it on does not understand its value. The network connects the haunting plot to the burglary.
The first day at Paseo Place
Before the theft
Late afternoon on the first camera stakeout
The morning after the church incident
The day before the burglary