What Evidence Matters to Jurors? The Prevalence and Importance of Different Homicide Trial Evidence to Mock Jurors

Abstract

The present research explores how important different trial evidence is to mock jurors’ decisions. Study 1 surveys legal professionals to determine what evidence is common at homicide trials. Study 2 utilizes the list of evidence generated in Study 1 to ask mock jurors to report how important each piece of evidence would be in deciding their verdicts. The results indicate that DNA is most important to mock jurors, followed by fingerprints, the weapon, video records, crime-scene photos, gunshot residue, bodily secretions, video confession, testimony from a forensic expert, and eyewitness testimony. Study 3 utilizes a different methodology wherein mock jurors were presented with folders labeled with different evidence and asked to choose the piece of evidence they wanted to learn more about first, second, and so on. The results from Study 3 indicate again that DNA evidence is most important to mock jurors, followed by video confession evidence, eyewitness testimony, and fingerprint evidence. Implications are discussed.