A "piercing scream" was heard on the night two sisters were savagely stabbed to death in a park, a court has heard.
Nicole Smallman, 27, and Bibaa Henry, 46, were allegedly attacked by Blackheath teenager Danyal Hussein in the early hours of June 6 last year.
The sisters had been in Fryent Country Park in Wembley, north-west London, to celebrate Ms Henry's birthday.
Their bodies were discovered in bushes by Ms Smallman's boyfriend, who had joined the search for the missing women on June 7 last year.
On Tuesday, local resident Elaine Williams told the Old Bailey how she had been watching Silent Witness on television when she heard a noise at 1.45am on June 6.
She said she heard a man shouting and then more than one female shouting "really loud".
"All of a sudden I heard one female voice.
"And after I heard this really piercing scream that will live with me forever. It was so intense."
She told jurors that it was "like a massive argument".
Riel Karmy-Jones QC, defending, asked if it sounded like the voices knew each other.
Ms Williams replied: "No."
The next witness, Linda Guerrero, told how she saw two people in bushes as she walked her beagle Bambi on the morning of June 7 last year, before the bodies were discovered.
She said: "I crouched, peered in and I could see there was indeed somebody a bit further along on the ground.
"As I peered in I looked to see what I thought was a couple. The reason I thought it was a couple, the person lying on the floor with their back to me, it looked like they had a bare back.
"I also saw a pair of shoes that seemed to be draped over the person with the bare back. They seemed to be lying down.
"I assumed they were a couple because I thought they seemed to be intertwined slightly.
"I said something along the lines: 'Are you OK, are you alright mate?' There was no response."
She added: "We do occasionally get rough sleepers in the park and that's what I had assumed that the couple were - they had spent the night there sleeping."
The witness said that she later reported rough sleepers to StreetLink.
Hussein, of Guy Barnett Grove, Blackheath, south-east London, has denied double murder and possessing a knife.
The trial continues.
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