Murphy’s Criminal Plan
The Mystery of The Invisible DogJohn Murphy’s increasingly desperate effort to repair his finances drives the burglary, the attacks on witnesses, and the staged hospital alibi.
increasing
Bearing strength in each event
decreasing
A Hidden Debt

A Hidden Debt
Guardianship abused
John Murphy has borrowed from Harley Johnson’s account while speculating in the stock market. His losses leave him facing exposure when Harley comes of age.
Pressure without excuse
Murphy’s financial fear helps explain his desperation but does not erase his responsibility. The theft becomes an attempt to replace money he has no right to use.
A Convenient Tip

A Convenient Tip
Information from a wanderer
Sonny Elmquist may overhear that the Carpathian Hound is due at Edward Niedland’s home. He passes along knowledge without understanding the sculpture’s importance.
Opportunity recognized
Murphy recognizes the name Niedland and sees a chance to seize a valuable object. A seemingly idle piece of neighborhood gossip becomes the trigger for his crime.
The Home Invasion

The Home Invasion
A targeted robbery
Murphy breaks into Edward Niedland’s home and takes the Carpathian Hound. Police arrive, forcing him to improvise rather than carry the sculpture home.
Violence and concealment
He hides in the church, disguises himself as a saint, and strikes Earl. The effort to escape turns a theft into a violent crime.
The Witnesses Removed

The Witnesses Removed
A sequence of attacks
Murphy poisons Gwen Chalmers’s chocolates and rigs an explosive device in Mrs Bortz’s car. He aims to keep them away from the pool and its hidden sculpture.
A staged setback
He sets fire to his own apartment and enters hospital, creating an alibi while also removing himself from the building. Each act compounds the danger and narrows his options.
The Failed Exchange

The Failed Exchange
A trap closes
Murphy sends instructions for a cash handoff and waits in hospital, believing his location protects him from suspicion. Jupiter Jones follows the logic of his alibi instead.
Arrest and reckoning
The treated package and Murphy’s presence in the clinic expose him. His financial motive emerges, but the court, not the boys, will decide the consequences.
Before the story’s Christmas-week events
The day before the burglary
The night of the burglary
The days following the burglary
Late afternoon on the ransom day