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Is Interstate 95 the connection for moving guns up and down the east coast?

2024-04-09
(Press-News.org) Interstate gun transfers are a major contributor to gun crime, injury, and death in the United States. Guns used in crimes traced to interstate purchases move routinely between states along multiple major transportation routes, a phenomenon known as the “Iron Pipeline”, which refers most commonly to the Interstate 95 corridor. According to a new study at the Columbia University Mailman School of Public Health, other such “Iron Pipelines” exist throughout the country, playing a significant role in the interstate transfer of firearms used in crimes. The findings are published in JAMA Network Open.

The researchers aimed to identify possible gun trafficking routes along the Interstate Highway System -- a vital part of the transportation network, with approximately one-quarter of all vehicle miles traveled in the U.S. occurring on these routes.

“We hypothesized that counts of traced firearm transfers between states connected via major interstate highways would be greater than what we might expect based on their population sizes and geographic proximity, and that traced gun transfers would be greatest along the Interstate 95 (I-95) corridor,” said Christopher Morrison, PhD, assistant professor of Epidemiology at Columbia Mailman School of Public Health. “Understanding how guns flow around the country is important for identifying trafficking routes, and the impact that each state has on its neighbors.”

Using publicly available interstate gun trace data from the Bureau of Alcohol, Tobacco, Firearms, and Explosives, the researchers measured interstate transfers of firearms used or suspected to have been used in crimes from 2010-2019. Creating 48 separate datasets, one for each destination state of interest, the researchers compared the count of guns used in crime traced to interstate purchases for states with interstate highway connections and states without these connections.

The results show that between 2010 and 2019, 526,801 guns used in crimes in the lower 48 of the United States were traced to interstate purchases and that multiple interstate highways were involved in this gun flow. The researchers discovered previously unidentified “Iron Pipelines” throughout the country and determined that gun traffic along the I-95 corridor is more complex than previously recognized.

Earlier research by the authors demonstrates that inflow of guns from other states undermines local gun supply-reduction strategies, ultimately draining limited resources and contributing to the overall burden of gun crime in the U.S. This newest work suggests there may be a synergistic relationship between interstate connection and gun law strength in determining trafficking patterns.

From 2010-2019, 275,345 people died and 803,393 were admitted to emergency departments due to interpersonal shooting events. In 2019 alone, over 30,000 guns traced to in-state and interstate purchases were used in violent crimes such as assault, robbery, and murder. In addition to direct impacts of gun crime on health and safety, exposure to violence can have lasting impacts, including psychological effects and increased risk of cardiovascular disease and premature mortality.

“Our study showed that interstate gun flow has critical implications for gun violence prevention, as gun transfers across state lines can undermine local gun control policies,” noted Morrison, who is also affiliated with the School of Public Health and Preventive Medicine at Monash University, Australia. “By identifying highway routes regularly used for transfer of guns used in crimes, this study provides law enforcement and public health authorities with critical areas for intervention. Our data offer valuable insights into the origins of interstate crime guns, a key public health intervention point.”

“We conclude that national policies and inter-state cooperation are needed to address this issue,” said Morrison.

Co-authors are Leah Roberts, Brady Bushover, Ariana Gobaud, Christina Mehranbod, and Carolyn Fish, Columbia Mailman School of Public Health; and Mark Hoofnagle, Washington University School of Medicine.

The work was supported by R49CE003094 from the National Center for Injury Prevention and Control of the Centers for Disease Control and Prevention, and with funding provided by the New Jersey Center on Gun Violence Research at Rutgers University.

Columbia University Mailman School of Public Health

Founded in 1922, the Columbia University Mailman School of Public Health pursues an agenda of research, education, and service to address the critical and complex public health issues affecting New Yorkers, the nation and the world. The Columbia Mailman School is the fourth largest recipient of NIH grants among schools of public health. Its nearly 300 multi-disciplinary faculty members work in more than 100 countries around the world, addressing such issues as preventing infectious and chronic diseases, environmental health, maternal and child health, health policy, climate change and health, and public health preparedness. It is a leader in public health education with more than 1,300 graduate students from 55 nations pursuing a variety of master’s and doctoral degree programs. The Columbia Mailman School is also home to numerous world-renowned research centers, including ICAP and the Center for Infection and Immunity. For more information, please visit www.mailman.columbia.edu.

 

 

 

 

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[Press-News.org] Is Interstate 95 the connection for moving guns up and down the east coast?