Document Category: Police-Contaminated Confessions

This draft motion should be used to exclude a confession when police officers contaminate the confession by feeding nonpublic facts about the offense to the questioned suspect. Relying on social science research and police interrogation manuals, the motion argues that: (a) police-contaminated confessions are impermissibly coercive and result in involuntary statements (pg. 1-3); and (b) police-contaminated confessions should be excluded under Rule of Evidence 403 because their probative value is substantially outweighed by the danger of unfair prejudice (pg. 3-8).

This post-conviction brief cautions against crediting a juvenile’s custodial statements. Drawing on social science and U.S. Supreme Court precedent recognizing that youth are more vulnerable to pressure, more compliant with authority, and less capable of understanding long-term consequences, the brief explains that adolescents are disproportionately susceptible to suggestion and false confession. It details how factors such as isolation, leading questioning, minimization tactics, exposure to evidence, and failure to ensure meaningful comprehension of Miranda warnings undermine the voluntariness and reliability of juvenile admissions.