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Matching items together
This allowed for bits of things to be matched together to determine the killer -
Rape victims :(
sperm was able to be detected and analyzed -
Body heat
body heat was detected to decide when the victim passed -
photographs
Photography became significant -
fingerprinting
Fingerprints were being used for criminals to be identified -
tape lifting
tape lifting began to identify for finger prints -
DNA
DNA is something that is completely different from someone else , this allowed for more accurate results -
shell casing
FBI develops " Drugfire " which is an image system to compare marks on cartridge -
Foot wear
The start of being able to look at a footprint ad detect what shoes and how big the feet of the person is