“Real Housewives of Beverly Hills” star Erika Jayne’s son, who works as a member of the Los Angeles Police Department, was one of the first witnesses to testify in A$AP Rocky’s assault trial on Friday.

Thomas “Tommy” Zizzo Jr., whom the Bravo star welcomed with her first husband, Thomas Zizzo Sr., was called to the stand as one of the cops who responded to the alleged shooting.

He told the court what he saw when he arrived on the scene, outside of a hotel in 2021, according to TMZ.

While Tommy’s mother is a Bravolebrity, he has never made an appearance on “The Real Housewives of Beverly Hills,” and he prefers to keep it that way.

“He didn’t choose this life — I chose this life — and we try and protect him,” Jayne told Andy Cohen in 2020 about her son staying out of the spotlight.

“I don’t care if he’s an adult and he carries a gun and a badge. At the end of the day, he’s still my boy. He’s a very fine young man, and I’m super proud.”

A$AP Rocky’s trial began earlier this week after the rapper turned down a plea deal that offered him 180 days behind bars, a seven-year suspended sentence, three years probation and 500 hours of community service.

He also would have had to enter a guilty plea to the most serious of the two felonies for which he was charged — assault with a semiautomatic weapon.

The musician felt the deal would have cost him his livelihood, a source told TMZ.

“This would effectively end his career because he would lose all of his endorsement contracts, including Gucci, Puma, the Met Gala and, most important, he would not be able to tour and his career would be over,” the source told TMZ. “They would have him under their thumb for over 8 years.”

The “A$AP Forever” hitmaker is charged with firing a gun at a former friend A$AP Relli and is facing a 24-year prison sentence if convicted.

He pleaded not guilty to two felony counts of assault with a semiautomatic firearm.