A man has told the Old Bailey how he gave his wife of 50 years the kiss of life after she was stabbed 14 times in their north-west London home.
Anne Mendel was stabbed 14 times
Leonard Mendel, 81, said he returned to their house in Golders Green to find 84-year-old Anne Mendel under a pile of clothes in the hallway.
The prosecution allege former neighbour Kemi Adeyoola, 18, plotted a murder while at a young offenders' institute.
Miss Adeyoola, of Camden, north London, denies murdering Mrs Mendel last March.
She has also pleaded not guilty to two charges of perverting the course of justice.
Retired postal worker Mr Mendel told the court he had been out to buy tickets for the couple to visit their daughter in Israel shortly before he discovered his wife.
He said the wires to the phone in the hallway had been cut so he rang for an ambulance from the kitchen.
"I tried to give her mouth to mouth for three minutes until an ambulance woman arrived."
A paramedic told him the situation was serious and she had been stabbed, the court heard.
"It was not until then that I noticed blood on the wall," he said.
The prosecution said a document in which Miss Adeyoola had plotted a murder, was found during a routine search of her cell.
She wrote that she wanted to lose four stone in weight, make £3m and needed guns, knives and bullet-proof vests.
She described how she would kill an "elderly and defenceless" victim after robbing her, the court heard.
Sir Allan Green, prosecuting, said the teenager's DNA was found in blood on the pensioner's body.
A 16-year-old girl, who cannot be named for legal reasons, denies two charges of perverting justice by trying to fix a false alibi for Miss Adeyoola.
The case continues.