The sister of a man who murdered a city banker has been jailed for four years for lying by giving him an alibi.
Laura Campbell changed her plea at the last moment
Laura Campbell, 20, from Fulham, said her half-brother Damien Hanson was with her at a friend's flat when John Monckton was stabbed in London in 2004.
But her friend later told police she had lied. Campbell admitted perjury and perverting the course of justice.
Hanson was jailed for life for stabbing Mr Monckton in a raid at his home in Chelsea, west London.
Campbell will serve the first part of her jail term at a young offenders' institution.
The court heard that her half-brother approached her to provide him with a false alibi.
Sentencing Campbell, Judge Charles Byers at Blackfriars Crown Court said: "There came a time not too long after that when you realised the very serious charge that you would be protecting him from if you continued to lie, and you chose to do so.
"You maintained that lie through the year that followed and eventually brought it to fruition by giving false evidence," he said.
The court heard that Campbell had tried to repeatedly "corrupt" her friend Sade Haye to endorse her lie, but she refused.
Ms Haye was awarded £750 by the judge "for her assistance in the administration and fulfilment of justice".
Hanson, 25, was given three life sentences and jailed for a minimum of 36 years for murdering his 46-year-old victim.
He was also convicted of attempting to murder Mr Monckton's wife, Homeyra.
His co-accused, Elliot White, 24, was jailed for 18 years for manslaughter, robbery and wounding with intent.