Blog Archives

Raman spectroscopy adds discrimination in real forensic fibre cases

raman flock

Over the last ten years, Raman Spectroscopy has emerged onto the forensic landscape in many fields, from documents to drugs analysis, explosives, paint and condom lubricants, to biological fluids, gun shot residue and fibres, university researchers and operational forensic scientists

Posted in Case Commentary, Defence Forensics, Interpretation, Prosecution Forensics Tagged with: , , , , , , , , , ,

Why use Raman Spectroscopy for forensic fibre examination?

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Why use Raman spectroscopy for forensic fibre examination? This post describes why Raman has played such a major role in recent research and development in relation to fibres and how that is likely to continue. There are several key research

Posted in Contact Traces Research, Defence Forensics, Prosecution Forensics, Research, teaching Tagged with: , , , , , , , , , , , , ,

The evidential value of fibres used in Hi-Vis workwear

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T. Coyle*, C. Shaw, L. Stevens Contact Traces Ltd, Unit 26, East Central 127, Milton Park, Abingdon, Oxfordshire, UK To print / download a copy of this paper please click here. Abstract: This paper investigates whether the finding of fluorescent

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Forensic analysis of condom lubricants – brand level identifications

fingerprint

In a previous posting, DNA friendly condom lubricant analysis – no need to extract the swab with organic solvents, we discussed how we could analyse swabs extracted for DNA using FTIR and Raman spectroscopy and we referred to our previous paper where we

Posted in Research Tagged with: , , , , , , , , , ,

Spectroscopic Analysis of Trace Evidence – Webinar Video

fig4 FTIR map of the dried residue

Our recent webinar “Spectroscopic Analysis of Trace Evidence” is now available to view below:

Posted in Contact Traces Research, Defence Forensics, Prosecution Forensics, Research, teaching Tagged with: , , , , , , , , , , , , , , ,

Forensic analysis of paint – risk of false positives, missed opportunities?

white paint raman fingerprint region additional

White architectural paint is an evidence type frequently encountered in forensic casework.  Discrimination by microscopy is reduced as the variation in colour and fluorescence is far less than that observed in coloured paints. Attempts to discriminate white paints using FTIR

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Cold cases – assisting the lab extract DNA via Raman and FTIR

Von Apathy

It’s very rare at Contact Traces that we find ourselves assisting a DNA laboratory perform DNA extractions in cold cases, because we are not a DNA laboratory.  However, this case was an exception and we were happy to help. The

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Spectroscopic Analysis of Trace Evidence – free webinar

    Combined Spectroscopy Methods for Forensic Analysis Complimentary Webinar: Tuesday, March 26 Trace evidence examiners are required to obtain as much information as possible from microscopic amounts of material while respecting the need to maintain the integrity of the

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DNA friendly condom lubricant analysis – no need to extract the swab with organic solvents

Meniscus of extracted swabs

February 2013. This work is part of Contact Traces’ ongoing commitment to original forensic research. This work was completed in 2009 and is currently under review by a forensic journal, however the process is taking far too long to get

Posted in Contact Traces Research, Prosecution Forensics, Research Tagged with: , , , , , , ,

Foam particles strengthen the link

firearms2c

In this case the police had two vehicles under surveillance.  The occupants were under suspicion of committing firearms offences.  The vehicles were parked beside each other. A package was seen to be passed from the occupants in one vehicle to the

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