Meet “Freddie the Fingerprint”
Reviewing the actual courtroom testimony of forensic experts is clearly the way to suggest “reforms” and to publish how examiners approach their “science” in diverse ways.
An interesting look at what goes on in the US courts about fingerprints. Authors have some compelling concerns:
- •Numerous court cases show disparities in the management of fingermark dating issues.
- •This lack of consensus is due to the absence of a validated fingermark dating method.
- •Research about fingermark dating is on going and some approaches show promise.
- •Based on these approaches, a methodological framework for dating issues is proposed.
- •Data from cases and research should interact to develop a relevant dating methodology.
The question of the age of fingermarks is often raised in investigations and trials when suspects admit that they have left their fingermarks at a crime scene but allege that the contact occurred at a different time than the crime and for legal reasons. In the first part of this review article, examples from American appellate court cases will be used to demonstrate that there is a lack of consensus among American courts regarding the admissibility and weight of testimony from expert witnesses who provide opinions about the age of fingermarks. Of course, these issues are not only encountered in America but have also been reported elsewhere, for example in Europe. The disparity in the way fingermark dating cases were managed in these examples is probably due to the fact that no methodology has been validated and accepted by the forensic science community so far. The second part of this review article summarizes the studies reported on fingermark dating in the literature and highlights the fact that most proposed methodologies still suffer from limitations preventing their use in practice. Nevertheless, several approaches based on the evolution of aging parameters detected in fingermark residue over time appear to show promise for the fingermark dating field. Based on these approaches, the definition of a formal methodological framework for fingermark dating cases is proposed in order to produce relevant temporal information. This framework identifies which type of information could and should be obtained about fingermark aging and what developments are still required to scientifically address dating issues.