TY - JOUR
T1 - Oxidation monitoring by fluorescence spectroscopy reveals the age of fingermarks
AU - van Dam, Annemieke
AU - Schwarz, Janina C. V.
AU - de Vos, Judith
AU - Siebes, Maria
AU - Sijen, Titia
AU - van Leeuwen, Ton G.
AU - Aalders, Maurice C. G.
AU - Lambrechts, Saskia A. G.
PY - 2014
Y1 - 2014
N2 - No forensic method exists that can reliably estimate the age of fingermarks found at a crime scene. Information on time passed since fingermark deposition is desired as it can be used to distinguish between crime related and unrelated fingermarks and to support or refute statements made by the fingermark donors. We introduce a non-contact method that can estimate the age of fingermarks. Fingermarks were approached as protein-lipid mixtures and an age-estimation model was build based on the expected protein and lipid oxidation reactions. Two measures of oxidation are required from the fingermark to estimate its age: 1) the relative amount of fluorescent oxidation products 2) the rate at which these products are formed. Fluorescence spectroscopy was used to obtain these measures. We tested the method on 44 fingermarks and were able to estimate the age of 55% of the male fingermarks, up to three weeks old with an uncertainty of 1.9 days
AB - No forensic method exists that can reliably estimate the age of fingermarks found at a crime scene. Information on time passed since fingermark deposition is desired as it can be used to distinguish between crime related and unrelated fingermarks and to support or refute statements made by the fingermark donors. We introduce a non-contact method that can estimate the age of fingermarks. Fingermarks were approached as protein-lipid mixtures and an age-estimation model was build based on the expected protein and lipid oxidation reactions. Two measures of oxidation are required from the fingermark to estimate its age: 1) the relative amount of fluorescent oxidation products 2) the rate at which these products are formed. Fluorescence spectroscopy was used to obtain these measures. We tested the method on 44 fingermarks and were able to estimate the age of 55% of the male fingermarks, up to three weeks old with an uncertainty of 1.9 days
U2 - https://doi.org/10.1002/anie.201402740
DO - https://doi.org/10.1002/anie.201402740
M3 - Article
C2 - 24847728
SN - 0570-0833
VL - 53
SP - 6272
EP - 6275
JO - Angewandte Chemie (International ed. in English)
JF - Angewandte Chemie (International ed. in English)
IS - 24
ER -