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Henry Goddard first used bullet comparison. His comparison was to a mold Henry Goddard first used bullet comparison to catch a murderer. Henry Goddard first used bullet comparison to catch a murderer. https://www.coursehero.com/file/p72mc0/1835-Henry-Goddard-first-used-bullet-comparison-to-catch-a-murderer-His/
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William Duncan Mcnally invented the breathalyzer that measures the alcohol level
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Voiceprint identification was made by bell laboratories in the late1940s for military uses, but not used until late 1960s
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Frits Zernike invented the first contrast microscope, receiving a nobel prize
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DNA fingerprinting was first used by police to find the killer of two teenagers