Forensic Interview Techniques: The Science of Getting to the Truth

The Method Behind the Confession

When CBI Agent Graham Coder sat across from Chris Watts at the Frederick, Colorado police station on August 14, 2018, he already knew that Watts’s account of the morning was false. The neighbor’s doorbell camera had recorded Watts backing his truck into the garage at 5:27 AM and spending several minutes loading objects into the bed. Coder did not mention the footage. He asked Watts to walk through the morning again, slowly, giving him every opportunity to commit to a version of events that the held evidence would later destroy. The technique Coder used, whether he learned it by that name or not, was the Strategic Use of Evidence, and it produced a confession within 48 hours of a triple homicide that Watts believed he had concealed.

The Reid Technique, which has dominated American police interrogation since John Reid and Fred Inbau published Criminal Interrogation and Confessions in 1962, operates on a different premise. Reid assumes guilt before the interrogation begins and uses psychological pressure, minimization, and theme development to make confession feel like the path of least resistance. The method has produced confessions in thousands of cases. It has also produced false confessions in hundreds of documented ones, including the Central Park Five, in which five teenagers confessed to a rape none of them committed after hours of Reid-style interrogation. The Innocence Project has identified false confession as a contributing factor in approximately 29% of wrongful convictions overturned by DNA evidence, and the Reid Technique is implicated in the majority of those cases.

Three evidence-based alternatives address the problem from different angles. Fisher and Geiselman’s Cognitive Interview, developed in 1984 at Florida International University and UCLA, targets cooperative witnesses rather than suspects, using four memory retrieval mnemonics to produce 25 to 45 percent more accurate details than standard police questioning. The SUE technique, developed by Granhag and Hartwig at the University of Gothenburg, turns the investigator’s knowledge of the evidence into a diagnostic instrument by controlling what the subject knows about what the investigator knows. Kernberg’s Structural Interview, originally a clinical tool for assessing personality organization, reveals how a subject’s psychological architecture responds to confrontation, not by catching lies but by mapping the defense mechanisms that activate when contradictions in the narrative are named.

Each method answers a different investigative question. The Cognitive Interview asks: what does this witness actually remember? The SUE technique asks: is this suspect’s account consistent with the evidence we hold? The Structural Interview asks: what kind of person is sitting across from me, and what will happen to their coherence when I apply pressure? Together, they represent a forensic interviewing framework that the Reid Technique, for all its institutional dominance, cannot match.