Campus protests across the US result in arrests by the hundreds. But will the charges stick?

Hundreds of college students arrested this week while protesting the war in Gaza face criminal charges amid encampments, building takeovers and civil unrest. But how those charges play out − and whether they will stick − remains a key question.

On Tuesday night, New York City police arrested nearly 300 people at Columbia University and the City College of New York, part of the City University of New York (CUNY) system. A day earlier, clashes with protesters at the University of Texas in Austin resulted in 79 arrests. Tulane University said 14 protesters were arrested at an "illegal encampment" on the New Orleans campus. And officers made at least 70 arrests late last week and over the weekend at Arizona State University.

But scores of cases at other universities have already been dropped. In Texas, Travis County prosecutors dropped charges against 57 people arrested on the Austin campus last week. Travis County officials said the arrests, all of them on charges of criminal trespassing, lacked probable cause.

Experts say prosecutors will need strong evidence to gain convictions − if the cases even get to trial or even past initial court appearances.

Richard Serafini, a South Florida criminal defense attorney and former prosecutor at the Manhattan District Attorney’s Office, explained that with hundreds of arrests at a mass protest, prosecutors still “have to be able to have the evidence” against each arrestee.

“You can’t charge someone who just happened to be there,” he said.

Given the sheer number of people arrested, Serafini said it would not surprise him if many of the charges were dropped. “It’s not unusual” in circumstances such as this, he said.

Addressing the statement by New York authorities that they were trying to rid the Columbia University campus of "outside agitators," Serafini cautioned that as a prosecutor, “you look at what the person does; you don’t look at their status.”

Throughout U.S. history, charges against protesters have typically fallen off court dockets. For instance, more than 2,000 protesters were arrested nationwide after George Floyd’s death in May 2020 at the hands of police officers in Minnesota; only a handful of those charges were prosecuted, and the majority of them were dropped.

Floyd's death focused worldwide attention on policing and sparked protests, but prosecutors were reluctant to press forward with charges in the vast majority of cases against people who argued they were simply invoking their rights to free speech and civil disobedience.

Latest arrests at Columbia; authorities point to outsiders

The sweep of arrests on Columbia University's campus on Manhattan's Upper West Side came after officers broke into and cleared Hamilton Hall, a campus building where demonstrators had barricaded themselves for hours.

At a news conference Wednesday, New York City Police Department Chief of Patrol John Chell said 282 people associated with the protests at Columbia and about 20 blocks north at the City College of New York had been arrested.

Police said they had not yet determined how many of those arrested are enrolled students. It remains unclear whether non-students could face tougher punishment than students.

Speaking at the news conference, New York City Mayor Eric Adams said many of those behind the protest were "outside agitators" who had no association with the university. Young protesters “are being influenced by those who are professionals at radicalizing our children,” Adams said.

In an appearance on on NPR's "Morning Edition" on Thursday, Adams claimed more than 40% of those who were involved in the protests at Columbia and CUNY were not affiliated with either school. Columbia spokesperson Robert Hornsby said the university didn’t have arrest information and referred questions to the NYPD, and CUNY didn’t immediately respond for comment.

On Tuesday, a day after law enforcement broke up an encampment at the University of Texas, administrators said 45 of the 79 people arrested in the clashes had no association with the university.

"This is calculated, intentional and, we believe, orchestrated and led by those outside our University community," the administration wrote in a statement.

Of 14 arrests made by the New Orleans Police Department and Louisiana State Police on the Tulane University campus Wednesday, only two were students, the university said in a statement. Another six people, including one student, were arrested at campus protests Monday.

"The overwhelming majority of the protestors are unaffiliated with our community," Tulane administrators wrote.

Students to be arraigned

Initial charges against those arrested at Columbia and CCNY range from trespass to criminal mischief and burglary, NYPD Commissioner Edward Caban said. In New York, burglary is a felony charge.

But protesters' charges were reduced to misdemeanors ahead of arraignments, according to a statement from the Legal Aid Society.

The Legal Aid Society blasted the NYPD on Thursday for detaining and processing protesters who were eventually charged with low-level offenses. "Many protesters who were arrested earlier this week and arraigned last night were ultimately charged with criminal trespass, a low-level offense, and at that point, they should have been immediately released from custody," Tina Luongo, chief attorney of the organization's criminal defense practice, said in a statement.

Luongo said protesters were unlawfully held for more than the legal limit of 24 hours. "This is yet another egregious breach of New Yorkers’ rights," she said.

The NYPD did not immediately respond to a request for comment from USA TODAY on the Legal Aid Society's claims.

On Wednesday night, the first arrests from the protests at Columbia and the City College of New York began to be arraigned at the Manhattan Criminal Courthouse, the same building where former President Donald Trump’s hush money trial is underway.

Outside the court’s arraignment area, dozens of the protesters’ supporters gathered in the halls, many of them wearing keffiyehs. The mood was jubilant, and many were chatting or conferring with one another in small groups.

When one protester exited the courtroom after his arraignment, he was swarmed by friends and dropped to the floor in a brief moment of celebration.

That protester, who was at the City College demonstrations, had been charged with assaulting a police officer, a felony, and resisting arrest. However, the prosecutor handling his case recommended to the judge that he be released while police “continue to investigate” the incident.

Protesters arrested at Tulane on Monday could face charges of trespassing, resisting arrest and battery on an officer.

And 69 people arrested at Arizona State University's campus early Saturday were charged with criminal trespassing after an encampment stayed up past 11 p.m., breaking a university policy that prohibits demonstrations on campus during the hours of 11 p.m. to 5 a.m., the Arizona Republic, part of the USA TODAY Network, reported.

Advocates raise questions about arrest tactics

Tactics used by police to quash the demonstrations and arrest people raised concerns from some advocates.

Police called to the Austin campus pepper-sprayed demonstrators and dragged some away from an encampment formed shortly after a campus vigil for students in Gaza, the American-Statesman reported.

Some protesters at Columbia and CCNY were injured after NYPD officers reportedly used pepper spray, threw students to the ground and even drew weapons on them, according to the New York Civil Liberties Union.

"Repressing nonviolent demonstrations with police in tactical gear has put students, faculty, and protestors in harm’s way," the organization said in a statement Wednesday. "The police presence we saw last night was overwhelming."

Contributing: Eduardo Cuevas

This article originally appeared on USA TODAY: Arrests from campus demonstrations are racking up. What happens next?