NIJ's Sentinel Events Initiative

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"Sentinel Events" and Criminal Justice System Errors

When bad things happen in a complex system, the cause is rarely a single act, event or slip-up. More often, bad outcomes are "sentinel events."

A sentinel event is a significant negative outcome that: 

  • Signals underlying weaknesses in the system or process.
  • Is likely the result of compound errors.
  • May provide, if properly analyzed and addressed, important keys to strengthening the system and preventing future adverse events or outcomes.

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NIJ's Sentinel Events Initiative borrows extensively from medicine and aviation (and other industries) where a blame-placing, backward-looking review process is yielding to a more forward-thinking, non-blaming, problem-solving approach. As in these other fields, significant advances in criminal justice processes may be achieved through the combined efforts of researchers, system analysts and the broad span of practitioners whose work is inextricably linked to the occurrence of error — and the eventual strengthening of the system and the prevention of future system errors.

Sentinel Events "Beta" Pilot Project

​In April 2014, NIJ selected three jurisdictions — Milwaukee, Philadelphia and Baltimore — to serve as "beta" pilot sites to help explore the viability of conducting an all-stakeholder, nonblaming review of a sentinel event. NIJ, in partnership with the Office of Justice Programs Diagnostic Center, is providing limited technical assistance but no grant funds to these sites. The sites will conduct a review of a self-nominated sentinel event; the review teams vary among the sites but generally involve representatives of the prosecutor's office, the police department, the defense bar, victims or community interests, and city leadership.

NIJ's goal is to determine the feasibility of a sentinel events approach for learning from errors in the criminal justice system. Lessons learned from these pilot sites will be incorporated into subsequent NIJ Sentinel Events Initiative activities, including the possibility of a multisite demonstration field research grant program in 2015.

Funding for Sentinel Events Research

NIJ released a formal solicitation for research proposals in 2014. Funding under this solicitation will support multiple awards for either basic research or for applied studies (including evaluations) that can add to our understanding of how the concept of sentinel events can be used to improve the functioning of the criminal justice system.

Learn More About NIJ's Sentinel Events Initiative

Date Modified: April 4, 2014