Law Enforcement Officer Fatigue is a Critical Issue

EDITORS NOTE: The following article was brought to us by David Blake M.Sc and Edward Cumella PhD. about their research into law enforcement fatigue in relation to deadly force encounters. This subject if of vital importance to law enforcement officers and agencies around the world. We hope that you will engage in the conversation and bring the discussion back to your agencies.

Officer Fatigue and Officer Involved Shootings (OIS) – A deadly combination for error!

By: David Blake M.Sc and Edward Cumella PhD.

Law enforcement data indicate that officers frequently suffer from high levels of fatigue due to lack of sleep, unusual shift schedules, and long hours awake. Research confirms that fatigue impairs a person’s mental functioning, especially in areas such as decision making, reaction time, and memory. Yet little study has directly investigated fatigue’s impacts on officers’ performance in police specific tasks, particularly in deadly force situations.

A first of its kind study

A recent study conducted by me; David Blake, MSc., a retired police officer, and Edward Cumella, PhD, a professor of psychology at Kaplan University, has finally addressed this issue. Our ground breaking research examined fatigue’s effects on 53 officers’ decision making and reaction times when the officers were faced with deadly force situations. Officers completed online tasks both before and after each of their shifts, for one week. Records included a history of their sleep patterns, total hours slept, total hours awake, shifts worked, and sleep quality. Officers were then engaged in a series of simulated shoot/don’t shoot scenarios using pictures of potential targets, targets that use of force experts had previously classified as warranting either a shoot or don’t shoot response, or as ambiguous.

Dr. Cumella and I found that many fatigue measures correlated strongly with officers’ impaired decision making and slowed reaction times within the deadly force situations. In particular, poor sleep quality, greater total time awake, more days worked, and working night or swing shifts all decreased the accuracy of officers’ decisions to shoot or… Continue reading