# What Psychology of Crime means in The Canary Murder Case

> Vance uses psychological analysis and aesthetic principles to deduce the murderer's character, arguing that the crime's technical perfection reveals a calculating, superior intellect rather than a common criminal, and that the killer is a 'logical, calculating madman' driven b…

## Explanation

Vance uses psychological analysis and aesthetic principles to deduce the murderer's character, arguing that the crime's technical perfection reveals a calculating, superior intellect rather than a common criminal, and that the killer is a 'logical, calculating madman' driven by desperation.

The chapter emphasizes Vance's unique approach to understanding criminal activities through psychological analysis, a method new to police work.

Vance analyzes Lindquist's psychological state, describing him as a moral imbecile with manic-depressive tendencies.

Vance uses psychological manipulation during Skeel's interrogation, probing his reactions to the closet scenario to reveal hidden guilt.

Vance applies psychological analysis to deduce the murderer's intelligence and motive, contrasting with the police's surface-level approach.

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