
Kirstine Nielsen of Aarhus University (Denmark) discusses how targeted metabolomics ratios helped build a robust bloodstain time-since-deposition tool.

Kirstine Lykke Nielsen is an associate professor in forensic chemistry at Denmark’s Aarhus University with a Ph.D. in animal science and an M.Sc. in biotechnology. Her research focuses on advancing forensic science through metabolomics, high-resolution mass spectrometry, and data-driven analytical approaches. She has pioneered the use of routine forensic toxicology LC-MS data for metabolomics research, uncovering metabolic signatures related to drug exposure. Kirstine leads research initiatives that combine forensic analytical chemistry, machine learning, and biomarker discovery to develop practical tools for forensic investigations, including methods for estimating bloodstain age and postmortem interval.