A man has been charged with murder 10 months after a brawl which led to a man being stabbed to death in a park in southwest Sydney. The victim, formally identified as 24-year-old Ghassan Long, died at the scene after being stabbed in the brawl at Leonard Reserve, Roselands, in February. An 18-year-old man was arrested in Bankstown on Thursday and charged with murder. He was refused bail and is set to face a children's court on Friday, NSW Police said. Campsie detectives and the State Crime Command's homicide squad established Strike Force Poton following Mr Long's death. Three other people have been charged over the incident and remain before the courts with the investigation continuing.