Two teenagers have been jailed for life for murdering a 17-year-old girl in an east London park.
Jodie Chesney was stabbed in the back as she sat with friends in Harold Hill on 1 March.
Svenson Ong-a-Kwie, 19, and Arron Isaacs, 17, were both convicted earlier this month after a trial at the Old Bailey.
Ong-a-Kwie, of Romford, will serve a minimum of 26 years while Isaacs was detained for at least 18 years.
Explaining the sentences, Judge Wendy Joseph QC told the court she was “satisfied” Svenson had stabbed Jodie while Isaacs was a “willing supporter”.
“When that knife was driven into Jodie, that intention was to kill,” she said.
She added that her death “was part of a series of tit-for-tat attacks” which had been “increasing in ferocity”, and “although the target was not Jodie… there was a degree of planning”.
During the trial, each of the defendants blamed each other for the attack but a jury took less than six hours to find them both guilty of murder.
In an impact statement read before sentencing, Jodie’s father Peter Chesney said the death of his daughter “has destroyed my life”.
The 39-year-old, who was not in court, described how a year ago he had started a new job as a salesman in the City “and I was about to take over the world in a promising career.
“Now I sit here in the cabin in my garden writing this statement. I have left that job, the relationship with my wife has fallen apart and we are now getting divorced. I must sell my house, and above all, I have lost the most precious human being I will ever know,” he said.
Following the stabbing, Jodie collapsed into the arms of her boyfriend Eddie Coyle who told the court he had been “completely changed” by the events of that night.
“I find it hard to sleep most of the time. I’ve been diagnosed with PTSD from this, and it keeps me up most nights so I don’t sleep,” he said.