A man who beat a stranger to death because his girlfriend had broken his heart has been jailed for 25 years.
Ryan Backhouse, 19, brutally attacked Toni Rudman on 7 August 2010 before fleeing through an industrial estate in Plumstead, south-east London.
He was caught on CCTV kicking the 24-year-old in the head.
Convicted of murder at Woolwich Crown Court, Backhouse, from Woolwich, was told he must serve a minimum of 16 years of his 25-year jail term.
Duncan Penny, prosecuting, previously told jurors police had asked if Backhouse had beaten up a woman on a yard between North Road and White Hart Avenue.
Backhouse answered: "Yes. I was hurting so I wanted to hurt someone."
He was arrested on suspicion of grievous bodily harm and taken to Plumstead police station.
During the journey he said: "I am a hurt man. I have taken it out on the girl who broke my heart."
But when officers asked who the victim was, he answered: "I don't know. I have never seen her before.
"My girlfriend hurt me so I have hurt someone... I hit her, punched her and kicked her."
Backhouse was caught on camera connecting a flying kick with her head while she crouched on the ground.
Footage played to the court showed the pair walking along the road before the defendant launched what the prosecution called "a sustained and brutal attack".
"With his hands and his feet he murdered a complete stranger," said Mr Penny.
Backhouse admitted Miss Rudman's manslaughter but denied murder on the grounds of diminished responsibility.
The jury of seven men and five women heard Ms Rudman was a vulnerable victim with an alcohol problem.
Speaking after the verdict, Det Ch Insp Nick Scola of the Homicide and Serious Crime Command said: "Toni Rudman was a vulnerable young woman who was unfortunately in the wrong place at the wrong time."