The boy fled to a nearby supermarket where he changed clothes in a toilet then took a taxi to another location in Edinburgh.

He phoned his aunt and uncle who picked him up and alerted the police.

Mr McElroy said: “The accused made admissions to them such as: ‘I have done the crime, so I will do the time’.

“He told his relatives that people had pulled knives on him so he had to defend himself.

“He explained to his uncle that the weapon he had was a big ‘Rambo’ knife.

Iain McSporran, defending, said the boy had been “exploited” from the age of 13 or 14 to be a part of “street level” drug dealing.

He said an associate of Mr Carr had wanted “serious violence” inflicted on him for the alleged theft of an e-scooter.

The boy believed he had been “set up” to be attacked that night.

But Mr McSporran said there was no evidence to suggest Ms Davidson was involved in this or aware of any planned attack.

He said: “He is at a loss to explain rationally why he chose to attack Danielle Davidson.”

The boy is currently detained in a secure unit. He will be sentenced next month.