Another rally occurred on April 27, hosted by Kyle "Based Stickman" Chapman, Brittany Pettibone, Lauren Southern, and others at Martin Luther King Jr. Civic Center Park.

Protests and clashes continued into the month of September, with a campus visit from conservative radio host Ben Shapiro and the return of Yiannopoulos for "Berkeley Free Speech Week".

Security for the September events, though "Free Speech Week" was officially canceled by the organizers, cost the university hundreds of thousands of dollars.

[8][9] Within twenty minutes of the start of the violence, the Yiannopoulos event was officially canceled by the university police department due to security concerns, and protesters were ordered to disperse.

[21][22] At Martin Luther King Jr. Civic Center Park a "large number of fights" broke out, smoke bombs and fireworks were thrown into the melee, and pepper spray was used in the crowd.

[23][24] According to the Los Angeles Times, "Both groups threw rocks and sticks at each other and used a large trash bin as a battering ram as the crowd moved around the perimeter of the park.

[23] Police "seized a handful of cans of peppers [sic] spray, some knives, and dozens of sign and flag poles, skateboards, and other blunt objects" from members of the crowd.

[29] During the event, Nathan Damigo—a 30-year-old California State University, Stanislaus student and the founder of the white supremacist, alt-right group Identity Evropa punched a female protester in the face and then ran into the crowd.

[31] Also during the event, a man covering his face with a bandanna attacked three rally attendees with a bike lock, hitting one of them on the head and causing "significant injuries".

He was later identified by 4chan's /pol/ users as a former Diablo Valley College professor, named Eric Clanton, and subsequently arrested on three counts of assault with a deadly weapon, and ultimately sentenced to probation after pleading no contest to all charges.

[38] Coulter declined to reschedule, noting that she was unavailable on May 2 and that UC Berkeley had no classes scheduled for that week, and said she would hold her speech on April 27 with or without the university's consent.

[42][43][44][45] There was concern the gathering would turn violent based on "social media feeds of militant left-wing and right-wing activists abuzz with plans to proceed with demonstrations over the Coulter-Berkeley controversy.

The protest was part of a larger nationwide backlash against far-right movements in the aftermath of a deadly white supremacist rally in Charlottesville, Virginia, earlier that month.

[52][49] The protest was initially peaceful until about 100 masked black-clad anti-fascists carrying shields and sticks broke through police lines, bypassing security checks.

"[63] On September 14, conservative radio host Ben Shapiro gave a speech at the campus, which was covered by a crew for the political documentary No Safe Spaces.

"[70] Having not signed contracts with various invitees for them to appear and having already backed out of its only reserved, indoor venues, on September 23, Berkeley Patriot officially notified the campus that they were canceling all Free Speech Week activities.

[78] UC Berkeley spokesman Dan Mogulof said afterwards that the media event amounted to "the most expensive photo op in the university's history.

The groups fought inside an "empathy tent" and then began marching to People's Park, where Kyle "Stickman" Chapman and others from Patriot Prayer spoke about a war on whites and a "battle for Berkeley".

[83] Following the February events, Trump criticized UC Berkeley on Twitter, asserting that it "does not allow free speech" and threatening to de-fund the university.

[28] On June 6, 2017, Larry Klayman filed a lawsuit on the behalf of Robles, who alleges the university and others violated her First Amendment rights when she was attacked with pepper spray while being interviewed.

"[92] In January 2018, four people who were attacked while trying to attend a speech due to be given by Yiannopoulos filed a federal civil-rights lawsuit against the University of California, Berkeley.

The lawsuit alleged that campus and city officials failed to prepare for the rioting despite sufficient warning, and as a result would-be attendees were left vulnerable to assault by left-wing protest groups.