This paper addresses digital forensic analysis tools and their use in a legal setting. To enter scientific evidence into a United States court, a tool must be reliable and relevant. The reliability of evidence is tested by applying “Daubert” guidelines. To date, there have been few legal challenges to digital evidence, but as the field matures this will likely change. This paper examines the Da...

When mental health professionals testify in insanity defense cases (more generally, about mental state at the time of the offense [MSO]), opinion testimony is generally solicited after the prefatory question as to whether the forthcoming opinions are held with “reasonable medical certainty” (psychiatrists) or “reasonable scientific certainty” (nonmedical experts). The question and its answer—al...

This article provides a primer on forensic voice comparison (aka forensic speaker recognition), a branch of forensic science in which the forensic practitioner analyzes a voice recording in order to provide an expert opinion that will help the trier-of-fact determine the identity of the speaker. The article begins with an explanation of ways in which human speech varies within and between speak...

This report describes a new pyroxmangite-rhodonite occurrence visited briefly by the authors as part of a broader study o,f gemstones in British Columbia. The discovery is on the Cl-t claims, 1.5 kilometres northwest of Mount Roderick Dhu (lat. 49”12’, long. 118’37’), 13 kilometres northeasi of Greenwood (Figure 1). Rhodonite is a manganiferous semiprecious stone valued for its pink to deep red...

In federal courts, the admissibility of scientific expert testimony in the last century has been governed by three major standards. The first of these standards, the "general acceptance" test, arose from the 1923 Frye v. United States (Frye) and required that any technique or method introduced in court be generally accepted by the relevant community of scientists. The more liberal "relevancy" s...