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Unveiling Illicit Art: Forensic Analysis of Illegal Graffiti in the UK

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  1. www.pixelmap.com Some Call it Art:Case studies involving the spraying of illegal graffiti in the UKDr. Louissa Marsh

  2. Slide 1

  3. Slide 2 2. 3. 1. • Spray can • Rucksack • Sprayed can top • Spray can nozzle • Latex glove • Can of paint • Marker pen 4. 5. 7. 6.

  4. Slide 3 Suspect’s clothing examined for paint balls x40 stereo microscope

  5. Slide 4 x100 stereo microscope

  6. Slide 5 • 2006 & 2007: • 20 submitted graffiti cases • 67 submitted spray cans MTN Pintura 22 Belton Molotow 17 Others 21 Plasti-kote 4 Molotow Coversall 3

  7. Slide 6 Green spray paint x200 dark field microscopy Orange spray paint X200 bright field microscopy (cross polars)

  8. Slide 7 Purple spray paints mounted side by side x200 magnification reflected light (cross polars)

  9. Slide 8 The same spray paints x200 magnification light through blue filter

  10. Slide 9 x200 magnification light through Ultra-violet filter

  11. Slide 10 Submitted can sizes (%) Spray Cans Fullness on submission (%) Nozzle present ?

  12. Order of Frequency 1st 2nd 3rd 4th BlueBlackSilver 14.2% 26.8% 14.9% GreenSilver Black 13.6%19.6%13.4% RedRedRed 12.4%13.4%10.4% Black,silver & PinkBlueGreen 9.5% 11.3%9.0% Slide 11 % Frequency of colours found on items in the form of paint balls % Frequency of submitted control colours % Frequency of submitted can colours

  13. Questions? Many thanks for listening Louissa.marsh@LGCforensics.com www.LGCforensics.com

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