The moment 17-year-old Jodie Chesney was fatally stabbed in the back in an east London park has been described by police.
She was playing music with five of her friends in Harold Hill, Romford.
Two males who were in the park at the same time, but did not interact with Jodie’s group, left at about 9pm.
They returned around half an hour later and walked straight towards the group where one of the males stabbed Jodie once in the back.
They then ran off without saying anything, police said.
Jodie was pronounced dead one hour after police had been called.
She died from trauma and haemorrhage, a post-mortem examination has found.
The suspect who attacked Jodie is described as a black male aged in his late teens.
There are no arrests as yet.
The detective leading the investigation, DCI Dave Whellams, said that while a number of people had come forward, “there will be other witnesses and people with information that may prove crucial”.
He added: “Although the description of the suspect is limited, I am certain that people will have seen the two males hanging around the park or running away from the scene – or will otherwise have noticed something suspicious.
“I need those people to call me.”
One of Jodie’s friends at college, 18-year-old Lucy Elkin, said the attack was “unprovoked”.
“There’s no justification of any sort for something like this,” Ms Elkin told Sky News.
Describing Jodie as “pure and innocent”, Ms Elkin said it “shouldn’t have happened”.
” It was unprovoked. She didn’t deserve it.”
Jodie’s friends did not know who had carried out the stabbing, she added.
:: Anyone with information should call the incident room on 020 8345 3775, Tweet @MetCC, or ring Crimestoppers, anonymously, on 0800 555 111.