Donald Trump's youngest son contacted UK police saying he witnessed a friend in London being beat up during a video call, a court has heard.

Barron Trump, 19, told police he had friends call 999 from the US to report the alleged attack in January 2025.

Matvei Rumiantsev, 22, is on trial at Snaresbrook Crown Court accused of assault and two counts of rape, among other charges, against the alleged victim, who cannot be named for legal reasons.

He denies assault, actual bodily harm, two counts of rape, intentional strangulation, and perverting the course of justice by pressuring the woman to withdraw her complaints.

Trump called the alleged victim on January 18 last year, and shortly after, the US president's fifth child contacted the police, reporting an assault.

I'm calling from the US, uh I just got a call from a girl, you know, she's getting beat up, he said, according to a transcript of the call released by the Crown Prosecution Service.

This was happening about eight minutes ago. I just figured out how to, how to call someone. Uh, uh it's really an emergency.

Barron Trump was later asked by police to provide a witness statement and said in an email on May 2 that what he saw had been very brief indeed but indeed prevalent. He recounted seeing a man before the view flipped to the victim as she was being hit while crying.

The trial has revealed that Rumiantsev allegedly strangled the woman on the evening of January 17. He argues the encounter was consensual but describes the night as filled with arguments, and he even answered a call from Barron Trump to demonstrate the situation to the alleged victim.

The court proceedings are ongoing as more details emerge regarding the charges against Rumiantsev and their implications.