Heugelin's 19th-century method involved heating a crime scene footprint with live coals on a tin sheet to melt stearic acid into it.
This chapter from Hans Gross's 19th-century forensic manual provides a detailed, critical examination of historical methods for preserving crime scene footprints. The author systematically reviews techniques involving plaster, cement, stearic acid, and glue, highlighting their practical flaws and ultimately endorsing plaster of Paris as the most reliable method. The tone is highly technical and instructional, aimed at magistrates and police officers.

As heard by us

A direct account of preserving footprints before they are damaged or lost.

Footprints and Other Impressions reads like a field note on keeping a trace intact before weather, handling, or time erase it. The passage stays close to the work itself, comparing glue molds, plaster or cement, and flour and water paste or dough, then sorting out where each…

Read the full review in PlayNext →

Why you'd press play

You want the rules for saving a footprint before it is ruined.

Read the full recommendation in PlayNext →
Listen to the show on