Detectives investigating the murder of Moosakhan Nasiri in Newham have this evening charged a fourth man with his murder.
The 25-year-old man [E] of no fixed abode will appear at Thames Magistrates Court on Thursday, 22 February.
Previously, an 18-year-old man [C] from Plaistow and a 22-year-old man [D] from Stratford have appeared at court charged with Moosakan's murder. This follows the earlier arrest and charging of a 16-year-old boy [A] in connection with the killing.
All three appeared at the Old Bailey on Friday, 12 January and remain in custody.
An 18-year-old man [B] who was arrested on suspicion of murder on Wednesday, 18 October, has now been released under investigation.
Police recently issued a renewed appeal for information, and are particularly looking to speak to anyone who may have video footage of the incident.
Police were called to Plashet Park in Forest Gate at 16:07hrs on Sunday, 15 October to reports of an injured male.
At the scene, Moosakhan was found suffering from a stab wound to the chest.
The London Ambulance Service treated him, but he was pronounced dead at the scene.
A post-mortem examination held on Tuesday, 17 October gave cause of death as a stab wound to the heart.
Detective Inspector John Marriot, who is dealing with the investigation, said: "We are now a number of months on from when Moosakhan was brutally murdered, and while we have charged three people in relation to this murder, we would still be very keen to talk to anyone with information.
"This attack happened in the middle of a busy park and there will have been numerous witnesses to this violent stabbing. I would encourage anyone with information, and in particular any video footage, to submit this to us so that we can bring those responsible to justice."
Anyone who witnessed this incident or has information should call the Homicide and Major Crime Command on 020 8345 3715, or Crimestoppers anonymously on 0800 555 111.