A 15-year-old girl ran screaming from a bedroom after finding the blood-stained body of her sister, a court heard today.

Emma Ruddick told how she walked into the bedroom of her sister, 12-year-old Natalie, to be confronted by an horrific sight.

The jury at Newcastle Crown Court heard the youngster reliving the moment in a video taped interview with police.

She said: ''I ran up the stairs. Then I went to her bedroom but her door was shut so I opened it thinking she was in bed.

"She was on the floor and the bed was on top of her neck. There was blood all over the floor. It was all over her arms and everything as though the blood had dried on her skin. It was all over. I ran downstairs screaming to my mum. I ran downstairs and I shouted: mum she is dead.''

Ronald Pattinson is accused of knifing 12-year-old Natalie 25 times after she caught him stealing cash.

Pattinson, 18, was the boyfriend of Emma's other sister Claire, 16, at the time of the murder in March.

Fifteen-year-old was interviewed by police just days after the alleged attack in March this year.

She told how she had returned home with her mother, Dawn Ruddick and Claire, and entered the house via the back door before going to see where Natalie, who had been off school sick, was to be found.

When she ran screaming from the room Claire called an ambulance for instructions on administering first aid.

''Claire was giving her the kiss of life. She was talking to the ambulance men while she was doing things they were telling her to,'' Emma told police.

Mrs Ruddick was also in the house, she said, ''shouting and panicking for the ambulance to hurry up."

The next time Emma went to the room the defendant - who she called ''Ronnie'' - was there, standing in the doorway. She said he looked ''shocked'' and was in tears. Dawn was still crying and had to be calmed down by paramedics when they arrived.

Emma also told in the tape how she and Natalie had disliked Pattinson.

The court also heard how Natalie used to babysit for the defendant's aunt Dawn Pattinson who lived nearby.

In her evidence on the second day of the two-week trial Emma also told how Natalie had previously been receiving a number of ''funny phone calls'' when she would answer her mobile but then no one spoke.

Pattinson, of Belsay Place, Newcastle, denies murdering Natalie at her home in Frosterley Place in the Arthur's Hill area of Newcastle.