WESTMINSTER (CBSLA.com) —  The Orange County DA’s office on Monday formally charged a 19-year-old Anaheim man with inciting a riot at the Donald Trump rally in Costa Mesa last week.

Officials also said Fernando Alarcon threw an object at a CHP patrol vehicle causing damage during the melee on April 28.

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Other arrests made by Costa Mesa Police Department have not yet been submitted to the DA’s office.

Alarcon is charged with one felony count of vandalism with damage over $400, and one misdemeanor count of inciting a riot. If convicted, Alarcon faces a maximum sentence of three years in Orange County jail.

The defendant was arraigned Monday afternoon and is being held on $25,000 bail.

Alarcon is scheduled for a pre-trial hearing on May 9, at 9:00 a.m. in Department W-12, West Justice Center, Westminster.

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The CHP said Alarcon was observed inciting the crowd — seemingly leading a group of people blocking the street and traffic.

The CHP said Alarcon ran toward a second CHP vehicle and yelled “[Expletive deleted] the police!” He is accused of then reaching into his pocket, taking out an object, and hurling the object at the CHP officer’s patrol car. The CHP officer heard a thud and observed an object that lhe said ooked like a rock or roof tile fall to the ground. As a result, the vehicle sustained damage over $400.

Alarcon was subsequently arrested by CHP, who investigated this case.

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Deputy DA Jess Rodriguez of the Special Prosecutions Unit was named prosecutor in the case.