Criminal Investigation: a Practical Handbook for Magistrates, Police Officers and Lawyers, Volume 2 by Hans Gross (1847 - 1915) · LibriVox

Footprints and other Impressions i.C.1.b

·10 min·1 clip

A feeble thrust leaves a toe impression; a great thrust leaves a deep heel impression, revealing running speed.

This episode is a chapter reading from Hans Gross's 19th-century forensic manual, focusing on the biomechanics of running and how to analyze footprints to determine a suspect's speed and gait. It contrasts running with walking, explains how impulse and stride length affect footprint depth, and uses theoretical mechanics and photographic evidence to establish forensic principles.

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