Gurbaksh Chahal, a convicted abuser and millionaire tech entrepreneur, kicked his former girlfriend roughly 10 times during a 2014 fight at his penthouse apartment, while he was on probation for a domestic violence conviction, a San Francisco police officer testified Friday.

Officer Jose Hernandez’s testimony came during a hearing in San Francisco Superior Court where prosecutors sought to revoke the 33-year-old Internet mogul’s probation for an earlier attack on a different woman in the same apartment.

Friends and family of the Indian-born Chahal, once dubbed one of America's most eligible bachelors, protested outside the Hall of Justice before packing into Judge Tracie L. Brown’s courtroom for the morning hearing.

“It’s unfair. He has already paid the price,” said Chahal’s father, 72-year-old Avtar Chahal. “I’ve been watching this play out for three years.”

The former chief executive of online advertising platform RadiumOne was charged in 2013 with 47 counts of felony domestic violence and assault for the Aug. 5, 2013, attack on his then-girlfriend inside the penthouse at 301 Main St.

A San Francisco Superior Court judge, though, ruled a 30-minute video capturing the violent attack was not admissible because police seized it illegally. Chahal ultimately pleaded guilty to two misdemeanor charges of battery and domestic violence in April 2014.

While on probation, Chahal began dating a then-23-year-old South Korean woman he met in Las Vegas, and on Sept. 17, 2014, the two got into an altercation.

Hernandez testified the woman told him Chahal kicked her 10 to 12 times on his bed around 4 a.m. after they had been drinking. She immediately called police, but hung up before later dialing back and saying the call was unintentional, according to a 911 recording played in court.

Hernandez said the woman, whom The Chronicle is not naming, came into the Southern District Police Station on Oct. 6 at 1:30 a.m. to report the alleged attack.

The woman had gone to St. Francis Memorial Hospital the night after the episode, where a physician’s assistant, who testified Friday, said she documented two bruises on her right leg.

The alleged victim, though, has since returned to South Korea and has not returned to testify in the prosecution’s motion to revoke Chahal’s probation.

Judge Brown said she will conditionally take the evidence presented Friday into consideration. But she made no ruling on whether it — or evidence from the defense set to be presented in May — will be admissible before she takes the matter under consideration.

She will also decide if the video evidence that was tossed in the 2013 domestic violence case can be admitted in the probation hearing.

Chahal’s court appearance Friday became heated before he even entered the courtroom when bodyguards in his entourage shoved through a group of news photographers gathered in a hallway outside.

At the same time, more than a dozen of Chahal’s family members and close friends held signs outside the Hall of Justice reading, “We support Gurbaksh” and “Indians Deserve Equality and Justice.”

“He’s manipulating people,” Beverly Upton, executive director of the San Francisco Domestic Violence Consortium, said outside the hearing, referring to Chahal.

“This is how abusers work,” she said. “They try to intimidate, and victims are afraid to come forward. So far it’s worked.”

Evan Sernoffsky is a San Francisco Chronicle staff writer. Email: esernoffsky@sfchronicle.com Twitter: @EvanSernoffsky