This thesis explores the value of forensic science evidence through a comprehensive mixed-methods approach. It unfolds in two phases: firstly, scrutinising public and professional perspectives on forensic science, including digital forensics, and secondly, investigating its role in police investigations of violence against women and girls (VAWG). The first phase explores human perceptions from a lay person and CJS professional perspective of forensic science, which is crucial, given the human-driven nature of the adversarial process in England. Additionally, the public represent victims, witnesses, and offenders, with their insights informing crime prevention strategies, policy formulation, and continuous improvement initiatives. Two surveys, are designed, implemented, and analysed, with public and Criminal Justice System professionals. Findings reveal alignment between perceptions and the reality of digital forensic evidence frequency. However, a notable disparity emerges in perceptions of traditional forensic evidence frequency, with overinflated perceptions, raising concerns about biases. The research identifies a decline in trust and reliability of forensic science evidence over time, emphasising the need for education and transparency. Discrepancies in perceived understanding highlight the importance of effective communication about forensic evidence, especially digital forensics, impacting decision-making. The second phase of the thesis aims to examine the practical contribution of forensic science, especially digital forensic science, in 384 police investigations of VAWG crimes examining the interplay between forensic science and non-forensic disciplines (e.g. witness statements). Findings show a combination of digital, traditional, and non-forensic evidence play a pivotal role in investigation success. Notably, non-forensic evidence and digital evidence emerge as prevalent contributors, aiding most cases, in contrast to traditional forensic evidence. Within traditional forensics, DNA evidence surpasses other disciplines in its impact on VAWG cases. Despite a weak correlation, a statistically significant link exists between positive case outcomes and the presence of digital forensic evidence, non-forensic disciplines, and their combined application in police investigations of VAWG crimes.Concluding, the thesis compares findings with prevailing human perceptions, providing a holistic view of the value of forensic science evidence, aiming to advance knowledge, foster a deeper understanding of its role, and offer policy and practice recommendations.
| Date of Award | 4 Nov 2024 |
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| Original language | English |
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| Sponsors | College of Policing |
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| Supervisor | Rachel Armitage (Main Supervisor) & Liam Blunt (Co-Supervisor) |
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