7 Jan 1931 Jahr - Luminol and Blood Detection Kits: The use of chemical tests to detect trace evidence like blood developed over many decades. A simple, reliable prototype for police use (the polygraph) was developed around this time, and later chemical advancements like luminol built on this chemical-based evidence detection.

Zugefügt zum Band der Zeit:

timeline

Byjenely

2 Tagen zuvor

0

0

29

Datum: