Innovations in art research can aid forensic science

Analytical techniques can also detect ‘hard to find’ and concealed traces in criminal investigations

17 November 2017

In a special collaboration within NICAS the TU Delft, the Rijksmuseum, the UvA en the NFI have introduced a new method for detecting ‘hard to find’ and concealed forensic traces using a technique designed for cultural heritage research. The results have now been officially published in Nature’s open access journal Scientific Reports. The Netherlands Institute for Conservation, Art and Science (NICAS) was among others initiated in collaboration with NWO.

Shirts with bloodstains Photo: NFIFour different blood stains on a black t-shirt made visible by MA-XRF scanning techniques based on iron and potassium signals. Photo: NFI

Detection and imaging

The research is based on MA-XRF (i.e. scanning macro x-ray fluorescence spectroscopy) a technique originally developed for the elemental imaging of paintings and other works of art. In art science MA-XRF is known for revealing hidden paint layers and this exciting feature has assisted in art authentication and has enabled studies into the creative process of the artist. In the current study the potential of MA-XRF in forensic science has been demonstrated for the first time. Elemental signatures of biological traces (such as blood, sperm, urine and sweat) and complex gunshot residue patterns allow the detection and imaging of such traces on clothing items that are too dark or too fluorescent for traditional techniques.

Concealed traces

The method is fully compatible with forensic DNA profiling. Additionally, the new method offers interesting opportunities for aged traces, mixed stains, traces of poor quality and traces that have been accidentally or intentionally concealed. MA-XRF based lead imaging for example enabled the detection of a bullet impact in a wall even if multiple layers of paint are applied to conceal the evidence.

Further information

  • Website NICAS
  • Website UvA (Dutch)
  • Arian van Asten and Joris Dik were interviewed about the project for the Dutch newspaper De Volkskrant. Read the article (in Dutch) here.
  • The article in the open access journal Scientific Reports  

 

 

Source: Netherlands Institute for Conservation, Art and Science (NICAS)