The International Association of Chiefs of Police (IACP) is joining the Innocence Project, the Ohio Innocence Project and members of the Innocence Network to release a series of videos to educate law enforcement and other criminal justice professionals about the psychological phenomena that can impede criminal investigations and prosecutions and lead to wrongful convictions.


The seven videos below feature leading experts discussing how these psychological factors, such as memory malleability and implicit bias, affect criminal investigations and the work of other criminal justice actors, from prosecutors to defense attorneys. The videos also highlight some of the safeguards that can be employed to prevent wrongful convictions. The films are not intended to serve as an entire training but rather as a tool to demonstrate these phenomena in the context of a larger training session.

“Law enforcement officials are human and are susceptible to the same psychological phenomena that can adversely affect decision-making,” said Paul M. Cell, president of the IACP. “We are excited to be partnering with innocence organizations to make these videos available because education and training are critical to ensuring that these phenomena don’t adversely affect investigations.”  

Confirmation Bias

Dr. Sherry Nakhaeizadeh explains how people tend to interpret evidence in a way that confirms their assumptions and preconceptions.

Implicit Bias

Professor L. Song Richardson explains how personal experiences shape our views and can result in unintentional bias.

““Law enforcement officials are human and are susceptible to the same psychological phenomena that can adversely affect decision-making.” ”

Paul M. Cell

President of the IACP

Memory Malleability

Dr. Elizabeth Loftus discusses how memory is constructed and how it is susceptible to being manipulated by false information.

False Confessions

Dr. Saul Kassin explains how interrogation techniques can cause innocent people to falsely confess to crimes they didn’t commit.

Tunnel Vision

Retired Detective Jim Trainum explains the harm of focusing on a single or limited police or prosecutorial theory and seeking only evidence that confirms that particular theory.

Eyewitness Misidentification

Dr. Jennifer Dysart explains how memory affects identification and how to prevent eyewitness misidentifications.

Lie Detection and Demeanor Evidence 

Dr. Par-Anders Granhag exposes the myth that it is possible to tell whether or not someone is being truthful from their physical ticks and mannerisms.

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  1. Peter Schecter says:

    these are EXCELLENT teaching/awareness tools!! i wiull be using them this week and appreciate the efforts put forth to provide them.

  2. Martha Correa says:

    I’m deaf, is there a transcript for these videos?

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