A shop worker has been found not guilty of helping his younger brother slit a woman’s throat following a schoolboy row.

On Monday, Prince Ben Rauf, 25, was found not guilty of helping 16-year-old Usman, carry out the attack on the mother and her two sons.

The brothers, of Ramsden Road in Balham, went to Karen Connolly’s house in Penrith Street, Streatham Vale, after a fight between Usman and her 15-year-old son, Elliot Carr.

Usman pleaded guilty to stabbing the woman and injuring her older son, Ethan Carr, 16, during the incident on December 7.

Ms Connolly told Kingston Crown Court: “He [Prince] started getting into my face. I felt a bit taken a back.

“I thought we were going to have a civil conversation, to begin with.

“I wanted to sort it out. I saw something over his left shoulder.

“It was a dark shadow, and then it was gone. I thought I’d been punched in the throat until I saw all the blood.”

The court heard how Prince became angry after arriving at her door at 6pm to discuss the fight between Elliot and his brother Usman.

Then Usman, wearing a mask, appeared from behind his shoulder, stabbed a shard of glass into her neck and smashed a brick on to her head.

The prosecution alleged Prince then fought with Elliot – but the jury later found this to be untrue.

Meanwhile, Usman fought with Ethan on the stairs and, in the chaos, a brick was thrown and narrowly missed Ms Connolly’s baby, Imogen.

Ms Connolly broke her leg slipping on her own blood and needed lengthy treatment in hospital – including 10 stitches to her neck.

Prince, a shop-floor worker at Marks and Spencer, told the court he left the scene as soon as his brother carried out the stabbing and sat in his car in shock.

He said: “I felt disgusted and ashamed and subsequently I didn’t speak to my brother any more.”

Prince Ben Rauf was found not guilty of grievous bodily harm (GBH), while Usman pleaded guilty to GBH and wounding with intent.

The defence alleged another person accompanied the brothers to the house, but they have not been charged.

Usman Ben Rauf, whose identity can be revealed this week after the Streatham Guardian successfully applied for his anonymity to be lifted, will be sentenced in September.