Stephan Ramirez was taken into custody at his home on felony assault charges and an outstanding warrant after officers obtained arrest and search warrants, police said. The arrest followed a chaotic Sunday at Levi's Stadium, where the San Francisco 49ers hosted the Las Vegas Raiders and multiple fights broke out both in the stands and in the parking lot.

Police reported 11 other arrests, 45 ejections and two hospitalizations stemming from a series of violent altercations during the game. Both hospitalized individuals have since been released. Investigators are still working to identify and arrest others involved.

The violence unfolded despite a heavy security presence that included roughly 30 outside agencies, according to police. Videos circulating on social media showed fans trading blows, people knocked to the ground and others left motionless in the upper deck and outside the stadium.

The 49ers condemned the violence in a statement, saying the organization has a zero-tolerance policy for fighting at Levi's Stadium and praising police and security teams for their swift response.

Santa Clara police are asking anyone who witnessed the brawl or who has video footage of the fights to come forward as their investigation continues.

The arrests and ejections come as the stadium and local law enforcement face scrutiny over crowd safety at one of the region's largest venues. The 49ers' zero-tolerance stance and the multi-agency security deployment highlight the challenge of managing tens of thousands of fans during high-profile games.

Anyone with information is urged to contact Santa Clara police.