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Crime shows like CSI and NCIS give a.

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futuristic if somewhat unrealistic look. at the world of forensics but now a team. of researchers is working on a reallife. crime solving technique since then has. been tried for 30 or 40 years and it. could outperformed even the best. fictional sleuth. investigators have long relied on. fingerprints to solve cases the world’s. loops and arches of a print are unique. to every person on the planet and can. help pin down a particular criminal but. determining how long a fingerprint has. been at a crime scene is still a major. challenge one Shin murder moto and Ed. Cisco at the National Institute of. Standards and Technology are trying to. solve their research appears in. analytical chemistry a journal of the. American Chemical Society they’re using. a highly sensitive mass spectrometry.

Technique to map the chemical.

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composition of a fingerprint when you. put down a finger for initially most of. your materials can find to the. fingerprint ridge and as they ages it’ll. move out of the ridge into the valley. and by monitoring which compounds are. diffusing how fast they’re diffusing. don’t try to tie that back into how old. a fingerprint is their published. findings deal with prints that are about. four days old but cisco says they’re. continuing to track samples much longer. than that. there’s definitely significantly visible. changes between the first week the first. month three months six months Cisco says. the samples are being tracked under. ideal lab conditions but future research. will focus on fingerprints in a variety. of settings once we see it’s feasible. then we’ll move on to more realistic and.

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