Brown University mass shooting
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Multiple sources told NBC News the person of interest who was taken into custody but later released was a 24-year-old with links to Wisconsin.
Tretta isn't the only Brown University student who has now survived two school shootings. Zoe Weissman, 20, attended Westglades Middle School -- adjacent to Marjory Stoneman Douglas High School in Parkland, Florida -- when a former student shot and killed 17 people in 2018.