On March 6, 2025, the Washington Free Beacon reported that Puelle was arrested along with eight other anti-Israel activists on March 5, 2025, at pro-Hamas rally after occupying Barnard's Milstein Library.
Puelle was charged with "disorderly conduct, trespassing, and obstructing governmental administration."
Also on March 6, 2025, the New York Post reported that Puelle had been "hauled off campus" by the police.
Following her arrest, StopAntiSemitism reported that Puelle was suspended by Columbia.
The library takeover, which was organized by the pro-terror student coalition Columbia University Apartheid Divest group (CUAD), was in support of students who had been suspended for interrupting a "History of Modern Israel" class on January 21, 2025, and distributing anti-Semitic flyers.
During the takeover, anti-Israel activists distributed pamphlets written by the "Hamas Media Office" justifying the group's October 7, 2023 terror attacks. They also chanted: "Intifada, intifada! Globalize the Intifada!"
The activists also shared posters that read: "DEATH TO AMERICA," writing the same message on the library's guest book. They also shared posters in support of former Hamas leader Yahya Sinwar.
During the takeover, protesters also chanted: "Disclose! Divest! We will not stop! We will not rest!" and held a wanted poster of Barnard president Laura Ann Rosenbury.
Classes were reportedly disrupted and the police were sent to the location, citing a "bomb threat."
On March 5, 2025, New York Times reported that this was the "second such sit-in to take place at Barnard over the issue," with anti-Israel activists having previously "staged a sit-in at Milbank Hall."
