An unusual twist in a typical domestic violence case in a London court has captured global attention.

The incident gained notoriety because the key witness, who alerted authorities from 3,500 miles away, was none other than Barron Trump, the son of the U.S. President.

Barron’s timely action led to the conviction of Matvei Rumiantsev, the son of a wealthy Russian coffee magnate, who assaulted his girlfriend in a fit of jealousy.

The assault occurred on January 18 of last year, just before Donald Trump’s second presidential inauguration. Barron, then 19, witnessed the attack via FaceTime while speaking to the victim in her London apartment.

Shocked by the scene, Barron managed to reach out to emergency services, informing a City of London Police operator, “I just got a call from a girl… she’s getting beat up,” as reported in Snaresbrook Crown Court.

Prosecutors revealed that former MMA fighter Rumiantsev’s jealousy stemmed from the victim’s friendship with Barron Trump.

The 22-year-old son of a Russian coffee tycoon, who went to an £80,000-a-year UK boarding school and lived in Canary Wharf, east London, was convicted of assault occasioning actual bodily harm and perverting the course of justice.

He was found not guilty of one count of rape and intentional strangulation relating to the same date when Mr Trump made his report to police and cleared of another count of rape and assault in November 2024.

When Rumiantsev answered the video call on the girl’s phone, he showed Barron her face then grabbed her hair and pushed her to the floor, shouting ‘you are not worth anything’, the court heard.

Matvei Rumianstev (pictured) was today found guilty of beating up his girlfriend while she was on a FaceTime call with Barron Trump – but was cleared of raping her

Jurors at a trial at Snaresbrook Crown Court were told to treat Barron Trump’s (pictured) account of his friend’s alleged attack with caution and consider if it may be biased or mistaken

He had called the woman a ‘slut’ and a ‘whore’ and kicked her in the stomach when she was on the floor next to the fridge.

It is believed the victim is British, of Belarussian descent, in her 20s and the daughter of an influencer.

In a transcript of the call he made to the emergency services, Mr Trump said: ‘Oh I’m calling from the US, uh I just got a call from a girl, you know, she’s getting beat up’, the court heard.

Mr Trump replied to investigating police in May in an email which said ‘what I saw was very brief indeed but indeed prevalent’.

It continued: ‘I didn’t expect her to pick up due to the difference in the time zone to the fact I am in the USA, the phone was answered but not by her, to my dismay.

‘The individual who picked up the phone was a shirtless man with darkish hair, although I didn’t get a good look, this view lasted maybe one second and I was racing with adrenaline.

‘The camera was then flipped to the victim getting hit while crying, stating something in Russian. The guy had hung up. This whole interaction had lasted 5 to 7 seconds.’

Prosecutor Serena Gates said that Rumiantsev was jealous of the woman’s friendship with Mr Trump, perhaps because of his ‘public profile’.

She told jurors to note Mr Trump’s ‘urgent’ and ‘worried’ tone in the call to police.

The court had heard that Rumiantsev and the woman had been drinking together on the evening of January 17, 2025 and into the early hours of the next day.

The prosecution said that Rumiantsev assaulted the woman that day, including hitting her in the face.

Russian national Matvei Rumiantsev was accused of repeatedly punching Barron’s female friend in a flat in London while President Trump’s son was on a FaceTime call to her from the US

Rumiantsev (pictured centre) denied allegations including assault, two counts of rape and intentional strangulation

Rumiantsev became aware of the woman’s friendship with Mr Trump in October 2024. In court, he was asked if he was jealous of males that the woman might speak to.

‘What I was really unhappy about was that she was frankly leading him (Barron Trump) on,’ he replied.

Rumiantsev told the court: ‘I am being portrayed as a jealous person who can lose his temper due to jealousy. I want to just make clear that her actions towards him was wrong and it was not fair.’

He added: ‘I was jealous to some extent.’

The perverting the course of justice charged relates to a letter written to the woman by Rumiantsev from prison after the January 18 attack, asking her to withdraw her allegations.

Rumiantsev attended an elite international boarding school in Cambridge.

His father, Sergey Rumyantsev, 53, is founder of a prominent Russian business success story called One Price Coffee, previously called One Bucks Coffee, until US coffee giant Starbucks challenged the name in court, forcing them to drop the ‘Bucks’ from their name.

Matvei’s father is listed in Companies House records as a director of One Price Coffee, and was born into a military family in Severomorsk, a closed Soviet naval town in the Arctic region of Murmansk.

Sergey attended the Tver Suvorov Military School from the age of 14, a prestigious cadet institution exclusively for the children of military families.

Matvei’s grandfather Vitaly Rumyantsev, now 86, was a senior naval officer, believed to be a captain.

The family is clearly wealthy and successful in Putin’s Russia. Before founding One Price Coffee, among other jobs, Sergey worked for British American Tobacco in sales, followed by Nike in international brand management and wholesale operations.

It is believed that Matvei came to Britain to study for GCSEs then A Levels, and he attended the elite Abbey College Cambridge, where boarding fees are set at that hefty £80k per year rate.

He can be seen in a college 2021 Alumni Reunion photo.

The school is known as an elite academy for the children of wealthy foreigners, and a likely passport to good UK universities.

Rumiantsev will be sentenced at the same court on March 27.