Law Enforcement and Corrections Commons^™

Are Police Officers Bayesians? Police Updating In Investigative Stops, Jeffrey A. Fagan, Lila J.E. Nojima

Faculty Scholarship

Theories of rational behavior assume that actors make decisions where the benefits of their acts exceed their costs or losses. If those expected costs and benefits change over time, behavior will change accordingly as actors learn and internalize the parameters of success and failure. In the context of proactive policing, police stops that achieve any of several goals — constitutional compliance, stops that lead to “good” arrests or summonses, stops that lead to seizures of weapons, drugs, or other contraband, or stops that produce good will and citizen cooperation — should signal to officers the features of a stop that …

The End Of Intuition-Based High-Crime Areas, Ben Grunwald, Jeffrey A. Fagan

Faculty Scholarship

In 2000, the Supreme Court held in Illinois v. Wardlow that a suspect’s presence in a “high-crime area” is relevant in determining whether an officer has reasonable suspicion to conduct an investigative stop. Despite the importance of the decision, the Court provided no guidance about what that standard means, and over fifteen years later, we still have no idea how police officers understand and apply it in practice. This Article conducts the first empirical analysis of Wardlow by examining data on over two million investigative stops conducted by the New York Police Department from 2007 to 2012.

Our results suggest …

Following The Script: Narratives Of Suspicion In Terry Stops In Street Policing, Jeffery Fagan, Amanda Geller

Faculty Scholarship

Regulation of Terry stops of pedestrians by police requires articulation of the reasonable and individualized bases of suspicion that motivate their actions. Nearly five decades after Terry, courts have found it difficult to articulate the boundaries or parameters of reasonable suspicion. The behavior and appearances of individuals combine with the social and spatial contexts in which police observe them to create an algebra of suspicion. Police can proceed to approach and temporarily detain a person at a threshold of suspicion that courts have been unable and perhaps unwilling to articulate. The result has been sharp tensions within Fourth Amendment …

Unconstitutional Police Searches And Collective Responsibility, Bernard E. Harcourt

Faculty Scholarship

Then the police officer told the suspect, without just cause, "I bet you are hiding [drugs] under your balls. If you have drugs under your balls, I am going to fuck your balls up."

Jon Gould and Stephen Mastrofski document astonishingly high rates of unconstitutional police searches in their groundbreaking article, "Suspect Searches: Assessing Police Behavior Under the U.S. Constitution." By their conservative estimate, 30% of the 115 police searches they studied – searches that were conducted by officers in a department ranked in the top 20% nationwide, that were systematically observed by trained field observers, and that were coded …

Police, Community Caretaking, And The Fourth Amendment, Debra A. Livingston

Faculty Scholarship

The local police have multiple responsibilities, only one of which is the enforcement of criminal law. Police gather eyewitness accounts in the aftermath of a shooting, but they also assist lost children in locating their parents. Police identify and arrest those who have committed felonies, but they also respond to heart attack victims and help inebriates find their way home. Sometimes police check on the well-being of elderly citizens. As Professor Goldstein said some twenty years ago, "The total range of police responsibilities is extraordinarily broad .... Anyone attempting to construct a workable definition of the police role will typically …

Police Patrol, Judicial Integrity, And The Limits Of Judicial Control, Debra A. Livingston

Faculty Scholarship

I want to thank St. John's for inviting me to be part of this reexamination of Terry v. Ohio – and particularly for this opportunity to participate in a roundtable discussion on the relationship between stop and frisk doctrine and the substantive law. This is an important and timely topic and I am happy to see it being discussed in such a serious venue.

When I was preparing my remarks for today, I thought I should call them, "Terry and the Substantive Law: A Hard, Hard Problem." Fortunately, I have sworn off titles with colons, so I settled on "Police …