Determining Fingerprint Age

March 16, 2020 — Researchers with Iowa State University in Ames, Iowa recently published a preliminary study that explores the possibility of linking compounds found in fingerprints with their age.

A press release from the journal where the study was published, Analytical Chemistry, states that determining the age of a fingerprint could help investigators narrow down the list of people who might have been present at the time a crime was committed.

"[P]ast research has shown that a gas chromatography-mass spectrometry method succeeded in determining if prints were more or less than eight days old; however, investigators often need more precision," said the press release. "To get a better idea of when prints were deposited, Young Jin Lee and colleagues looked to reactions already suspected to take place in these residues, when ozone in air reacts with unsaturated triacylglycerols left by a fingertip."

You can read the full press release here.

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Forensic Podiatry (Part Two of Two)

THE DISCIPLINE of forensic podiatry—or, in other words, the examination of pedal evidence—has progressed significantly over the past ten years. It is no longer a question of “What can you do with a footprint?” but rather, “Who can we use to evaluate the footprint?” Cases involving pedal evidence, especially bloody footprints and issues of determining shoe sizing or fit issues compared to questioned footwear, have become more common over the past two or three years.