Law Commons^™

Introduction, Shari S. Diamond, Richard O. Lempert

Articles

Experts bedeviled the legal system long before seventeenth-century Salem, when the town's good citizens relied on youthful accusers and witchcraft experts to identify the devil's servants in their midst. As in Salem, claims of expertise have often been questioned and objections raised about the bases of expert knowledge. Expertise, then and now, did not have to be based on science; but the importance of science and the testimony of scientific experts has since medieval times been woven into the fabric of the English jurisprudence that Americans inherited. In cases as long ago as 1299 we find examples of courts seeking …

Expert Testimoney And Opinion Evidence In A Narcotics Prosecution, Robert Ewald

Faculty Works: Criminal Justice and Legal Studies

Courts in New York have admitted expert testimony when “it would help to clarify an issue calling for professional or technical knowledge, possessed by the expert and beyond the ken of a typical juror.” People v. DeLong 60 NY2d 296 (1983). More specifically, in making such a determination, the trial court must consider [1] “when jurors are able to draw conclusions from the evidence based upon their day-to-day experience, their common observation and their knowledge, [2] and when they would be benefited by the specialized knowledge of an expert witness.” Cronin at 433. The Court of Appeals has recognized that …

The Effects Of Expert Testimony In Sexual Assault Trials, Lillybelle K. Deer

CMC Senior Theses

Recently, expert testimony in sexual assault trials shifted from an emphasis on Rape Trauma Syndrome (RTS) to Posttraumatic Stress Disorder (PTSD) and experts have tied these diagnoses either loosely or tightly to the victim’s condition following sexual assault. In the current study, 326 jury-eligible adults completed a survey on Amazon Mechanical Turk in which they read a synopsis of a sexual assault trial and an expert testimony with either RTS, PTSD or neither; along with either no, loose, or tight links made between the diagnosis and the victim’s condition. There was no main effect of diagnosis label but testimony linkage …

Juror Perceptions Of Eyewitness Identification Evidence, Timothy G. Wykes

Theses and Dissertations (Comprehensive)

Jurors rely on eyewitness testimony in deciding a defendant’s guilt or innocence. Archival analyses of hundreds of post-conviction DNA exonerations have identified eyewitness misidentification as the highest individual factor contributing to wrongful convictions (Innocence Project, 2014). Internationally, criminal justice systems have employed procedural safeguards (PSs) to educate juries on factors affecting eyewitness identification accuracy. Two such safeguards include the introduction of eyewitness expert testimony during trial proceedings and the reading of cautionary instructions by a presiding judge. In an independent factorial design, this research sought to examine the effects of a model judicial caution drafted by the Ontario Judicial Council …

High Expectations And Some Wounded Hopes: The Policy And Politics Of A Uniform Statute On Videotaping Custodial Interrogations, Andrew E. Taslitz

Northwestern Journal of Law & Social Policy

Much has been written about the need to videotape the entire process of police interrogation of suspects. Videotaping discourages abusive interrogation techniques, improves police training in proper techniques, reduces frivolous suppression motions, and improves jury decision making about the voluntariness and accuracy of a confession. Despite these benefits, only a small number of states have adopted legislation mandating electronic recording of the entire interrogation process. In the hope of accelerating legislative adoption of this procedure and of improving the quality of such legislation, the Uniform Law Commission (ULC) ratified a uniform recording statute for consideration by the states. I was …

3. The Relevance Ratio: Evaluating The Probative Value Of Expert Testimony In Child Sexual Abuse Cases., Thomas D. Lyon, Jonathan J. Koehler

Thomas D. Lyon