CSAFE’s Latest Resources
Change cannot happen without community. CSAFE is passionate about achieving its mission to apply a statistically sound and scientifically solid foundation to the interpretation of forensic evidence. To that end, we invite fellow scientists and researchers, along with those in the forensic and legal communities, to use and share these resources as we work together to elevate forensic science and technology.
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Found 242 Results
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Characterizing verification and blind proficiency testing at forensic laboratories
Type: Presentation Slides Research Area(s): Implementation and Practice,Latent Print
Published: 2022 | By: Maddisen Neuman
The 2014 Bureau of Justice survey of publicly funded forensic crime laboratories found that while 97% of the country’s 409 public forensic labs reported using some kind of proficiency testing, only 10% reported using blind tests (Burch et al, 2016).…
Likelihood Ratios for Categorical Evidence With Applications in Digital Evidence
Type: Presentation Slides Research Area(s): Digital,Forensic Statistics
Published: 2022 | By: Rachel Longjohn
The following poster was presented at the 74th Annual Scientific Conference of the American Academy of Forensic Sciences (AAFS), Seattle, Washington, February 21-25, 2022.
How do latent print examiners perceive blind proficiency testing? A survey of practicing examiners
Type: Presentation Slides Research Area(s): Implementation and Practice,Latent Print
Published: 2022 | By: Brett Gardner
The current study sought to explore perceptions of BPT among practicing latent print examiners and determine whether such beliefs varied between examiners who work for laboratories with and without BPT. Overall, opinions regarding the value of BPT to accurately assess…
Statistical support for weight of evidence determinations of handwriting evidence
Type: Presentation Slides Research Area(s): Forensic Statistics,Handwriting
Published: 2021 | By: Danica Ommen
Handwriting analysis is conducted through the expertise of Forensic Document Examiners (FDEs) by visually comparing writing samples. Through their training and years of experience, FDEs are able to recognize critical characteristics of writing to evaluate the evidence of writership. In…
Score-Based Likelihood Ratios for Camera Device Identification Using Cameras of the Same Brand for the Alternative Device Population
Type: Presentation Slides Research Area(s): Digital
Published: 2022 | By: Stephanie Reinders
Score-based likelihood ratios are a statistical method for quantifying the weight of evidence and have been used in many areas of forensics, including camera device identification1,2,3. Small sensor imperfections caused during manufacturing, called photo response non-uniformity4, leave identifying features, called…
Forensic Analysis on Cryptocurrency Wallet Apps
Type: Presentation Slides Research Area(s): Digital
Published: 2022 | By: Chen Shi
The following was presented at the 74th Annual Scientific Conference of the American Academy of Forensic Sciences (AAFS), Seattle, Washington, February 21-25, 2022.
Mobile steganography: Looking to the future
Type: Presentation Slides Research Area(s): Digital
Published: 2021 | By: Jennifer Newman
Humans have sent secret messages for millennia. A cousin to cryptography, steganography is the art and science of sending a secret message in the open by camouflaging the message carefully. Steganography can take many shapes, and its digital form often…
Ensemble of SLR Systems for Forensic Evidence
Type: Presentation Slides Research Area(s): Forensic Statistics,Statistics
Published: 2022 | By: Federico Veneri
Score-based likelihood ratios (SLR) have been used as an alternative to feature-based likelihood ratios when the construction of a probabilistic model becomes challenging or infeasible [1]. Although SLR has been shown to provide an alternative way to present a numeric…
Blind Testing in Firearms Examination: Preliminary Results, Benefits, Limitations, and Future Directions
Type: Webinar Research Area(s): Forensic Statistics,Implementation and Practice,Training and Education
This CSAFE webinar was held on June 23, 2022. Presenters: Maddisen Neuman Quality / Research Associate, Houston Forensic Science Center Presentation Description: Open proficiency tests created by external vendors are used to meet accreditation requirements and demonstrate examiner competence;…
Surveying Practicing Firearm Examiners
Type: Publication Research Area(s): Firearms and Toolmarks,Implementation and Practice
Published: 2022 | By: Nicholas Scurich
A sample (n = 79) of practicing firearm and toolmark examiners was queried about casework as well as their views about the potential role that statistics might play in future firearm examinations and expert witness testimony. Principal findings include: The…
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