A man accused of stabbing a 15-year-old boy to death threatened another teenager with a 15in blade during a robbery earlier that day, a court has heard.

Romario Lindo, 21, is standing trial for the murder of Perry Jordan Brammer, who was knifed 10 times on the Broadwater Farm Estate in Tottenham on August 30 last year.

The pair had fought after Lindo stole brand new shoes belonging to a friend of a friend of Perry's outside Bruce Grove Station earlier that morning, the court heard.

The boy who bought the trainers described the robbery to the jury at Woolwich Crown Court.

The teenager, who cannot be named for legal reasons, said the 21-year-old came up to him, adding: "I think he said 'come here', or something like that.

"I said no, I didn't want to."

The witness said Lindo gave him a countdown to hand over the shoes that he was carrying in a bag on his back, explaining: "He counted up to five, I was trying to walk away but then he grabbed the bag.

"I was going to walk away but he just grabbed it."

In an earlier statement to police read to the court, the boy described Lindo as saying "don't make me back out my 15 inch".

He did not actually see a knife, the court heard.

Continuing his evidence he described a scuffle, adding: "We were both trying to get the bag and he punched me in the face."

The defendant then made off with the gold Nike 97s, worth £90, before he was eventually pursued by Perry, the court heard.

The witness told the court that before that day he had never seen Perry.

When he encountered Lindo on Willan Road, Perry was subjected to an attack all over his body, and knife wounds were found on his face and neck, chest, and buttocks, the court heard.

He was taken to hospital but died from his injuries on September 4.

The unnamed teenager said he witnessed the fight and described trying to hit Lindo with a bag.

He explained: "There was a pouch on the floor, I picked it up and tried to swing it.

"I tried to hit him with it, the person that got the shoes."

He then spotted the weapon on the floor and fled, adding: "I looked back and there was a knife on the floor next to them, close by.

"He picked it up, the person who got the shoes."

After that, he said: "I ran.

"I picked [the shoes] up because they were right next to me."

During Wednesday's hearing, the jury heard about the extent of Perry's injuries, including one knife wound which went from one side of his throat to the other.

Forensic pathologist Dr Benjamin Swift described the 6cm cut which "passed from [Perry's] right to his left, across the neck", and others, including a stab wound which went from eye to cheek.

In Perry's chest, Dr Swift noted the knife was twisted before being pulled out.

Lindo, who lived in Enfield, north London, admits robbery, but denies murder and possession of a knife.

The court heard on Tuesday that Lindo told police he was acting in self defence and alleged it was Perry who "was clearly holding a knife".

The trial continues.