University of Hertfordshire

  • A. A. Frick
  • P. Fritz
  • W. Van Bronswijk
  • A. Beaudoin
  • S. Bleay
  • C. Lennard
  • S. W. Lewis
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Original languageEnglish
Number of pages20
Pages (from-to)427-446
JournalJournal of Forensic Identification
Journal publication date1 Jul 2017
Volume67
Issue3
Publication statusPublished - 1 Jul 2017
Externally publishedYes

Abstract

Latent fingermark samples were collected on white copy paper from 148 donors to compare the relative performance of Oil Red O (ORO; propylene glycol formulation) and physical developer (PD; Tween 20 formulation) on both recently deposited samples and those stored for 30 days. PD, when applied following ORO treatment, was found to outperform ORO on both fresh and stored samples, with ORO performance significantly worsening on older samples. Statistical methods revealed that donor age, sex, and recent use of skin products had significant influence on physical developer performance on recently deposited samples. This variation appeared to decrease with increased sample age. Comparisons of the performances of 1,2-indanedione-zinc chloride (Ind-ZnCl2) and physical developer showed good complementarity. There was some correlation in that poor Ind-ZnCl2 performance coincided with poor PD development, suggesting that PD performance is negatively affected by low amounts of eccrine constituents. The lack of other strong correlations between the two reagents reinforce the importance of detection sequences rather than utilizing a single method for fingermark detection.

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