How Police Contact and Violence Impact Public Health

J'Mag Karbeah, an assistant professor at the University of Minnesota School of Public Health, gives Stanford Health Policy's latest health equity lecture, Her focus was on the public health implications for Black people who are exposed to police contact.
Mural of George Floyd Getty Images

The 2020 murder of George Floyd in Minneapolis highlighted the harms of racially discriminatory policing and inspired global protests against police brutality. For many, Floyd’s death and the live courtroom trial of the officer charged with his murder was their first real exposure to police killings.

Not for J’Mag Karbeah, PhD, a health services researcher at the University of Minnesota School of Public Health. She had already begun to ask herself how these police killings of Black men were affecting the mental and physical health of Black people — particularly among mothers and adolescents. 

“As a maternal and child health researcher, after each event, I found myself asking: `How do these traumatic events impact the health of the community, especially mothers and people who can get pregnant? How do you steel yourself to bring children into this world knowing what potential harms might happen to them?’”

Police Brutality Not New

Police brutality has been part of the American fabric since its beginnings, from the slave patrols of the early 1700s to the advent of television bringing racialized police attacks on Blacks into American homes during the civil rights movement. In the last decade, bodycams and social media have put a spotlight on police killings, with Eric Garner’s death by police chokehold in 2014 going viral due to his friend catching the homicide on his smartphone.

J'Mag Karbeah speaks at Stanford Health Policy


According to the Washington Post’s police shootings database, as of March 7 there have been 8,283 people killed by the police in the United States since Garner’s death. Last year alone, 1,098 Americans were killed by officers — the deadliest year for civilian killings by police. 

As the Washington Post database notes, half the people shot and killed by police are white, but Black people are shot at a disproportionate rate. They account for less than 14% of the U.S. population — but are twice as likely to be gunned down and killed than whites.

Yet there is little research or discussion about the public health implications of police contact, whether it’s homicide, violence, racial profiling, or harassment.

Karbeah is working to change that. She recently gave the Health Equity Lecture at Stanford Health Policy, outlining the ways in which police contact is impacting the health and well-being of communities, from pregnant women to adolescents.

How do you steel yourself to bring children into this world knowing what potential harms might happen to them?
J'Mag Karbeah, PhD
Assistant Professor at the University of Minnesota School of Public Health


The Fourth Encounter

“In addition to fatal encounters, researchers often discuss police brutality associated with physical, emotional, or sexual abuse perpetrated by officers,” Karbeah said. “But there is a fourth type of police encounter that is much more common and sometimes overlooked: routine contacts such as stops, frisking and searches that don’t result in detainment.”

In a study published in JAMA Open Network in December 2021, Karbeah and coauthors found that greater police presence in Black vs. white neighborhoods appears to contribute to the persistent Black-white preterm birth disparity in Minneapolis. Their research found that of 1,059 Minneapolis residents who gave birth in 2016, the odds of preterm births for those living in a neighborhood with a high police presence were 10% greater compared to their racial counterparts in low-presence neighborhoods.

The paper notes that pregnant Black women nationwide experience preterm birth at rate approximately double that of whites and Black women are also twice as likely to experience the death of an infant younger than 1 year. SHP’s Maya Rossin-Slater also bore this out in a recent study that showed that wealthy Black mothers and infants fare worse than the poorest white mothers and infants in the United States.

“Black pregnant people who live in areas with high levels of racial segregation are more likely to give birth prematurely,” Karbeah writes in the study. “Residential segregation relegates Black people to neighborhoods disproportionately affected by poverty, violence, and crime. In lieu of policy solutions to address these issues, greater police presence has been the answer in many communities.”

Karbeah points to research showing that high police presence in neighborhoods is associated with adverse psychological outcomes for Black residents. Karbeah and colleagues suggest that pregnant people may experience these same psychological effects in ways that lead to increased stress — which in turn can lead to an increase in preterm births.

J'Mag Karbeah speaks at Stanford Health Policy

Adolescent Health and Policing

Karbeah told the SHP lecture audience that adolescent health is another key area of her research as young people carry police encounters with them into adulthood. Their brains are still developing, and decisions made during this period can shape the rest of their lives. They are coming into their own, deciding where they fit in and who they can trust.

“An important aspect of policing that often gets lost when we start to think about police contact as a determinant of health is why people might come into to contact with the police,” Karbeah said. “Instinctively you might think, well, you usually do something bad and that is why you encounter law enforcement.”

But a cultural shift in policing, she notes, has gone from police focused on responding to crimes to a proactive model in which policing is attempting to prevent crime, leading to more officers in communities, turning more civilians into potential suspects and leading to more encounters.

“Research shows that stops are associated with stigma and shame,” Karbeah said, pointing to a study published in the Journal of Adolescent Health which shows that adolescents frequently stopped by police were more likely to report heightened emotional stress and PTSD symptoms.

“These stops are seen as unsettling or traumatic for young people and can alter a youth’s self-perception and their overall well-being,” she said. “The impact of these interactions accrues over time and becomes internalized.”

A young person may be stopped by police on the way home from school, for example, and might be left with feelings of shame, prompting them to turn away from family and friends. This can have life-course implications, she said, such as substance abuse, anxiety and depression, job loss and socioeconomic shifts.

“We were honored to host Dr. Karbeah at Stanford Health Policy for the Health Equity Lecture Series,” said Sherri Rose, a professor of health policy who leads the lecture series. “Her research on police encounters and health equity tackles challenging questions that have far-reaching implications across health policy.” 

Read More

Alyce Adams, Stanford Health Policy

Toward Equal Footing

In this Q&A, Stanford Health Policy's Alyce Adams talks about the devastating impact that chronic conditions like diabetes had on her own family members.
cover link Toward Equal Footing
Black Mother & Infant in Hospital

Striking Inequalities in Infant and Maternal Health Point to Structural Racism and Access Issues

Research by Petra Persson and Maya Rossin-Slater on health inequality finds wealthy Black mothers and infants fare worse than the poorest white mothers and infants.
cover link Striking Inequalities in Infant and Maternal Health Point to Structural Racism and Access Issues
Dr. Utibe Essien

Pursuing Equity in Pharmacology for Black Patients

Our recent Health Equity Lecture was given Dr. Utibe Essien, who is on a mission to ensure patients — regardless of race, ethnicity or socioeconomic status — have access to the highest-quality medications on the market.
cover link Pursuing Equity in Pharmacology for Black Patients