A 13-year-old girl and two boys aged 13 and 14 will go on trial this summer accused of the murder of a boy who was stabbed at a wildlife conservation area on the outskirts of Reading. Oliver Stephens, 13, was found at Bugs Bottom fields, close to St Barnabas Road, Emmer Green, on Sunday. He died of his injuries at the scene, police said. The three suspects, who cannot be named because of their ages, appeared at Reading crown court on Thursday morning charged with murder and conspiracy to commit grievous bodily harm. The girl was also charged with perverting the course of justice. The three, all from Reading, spoke in court only to confirm their names, ages and addresses, according to the PA Media news agency. No application for bail was made. The teenagers will next appear at a pre-trial hearing at the same court on 4 February and a provisional trial date has been set for 21 June, also at Reading crown court. They were all remanded in custody at a youth detention centre. Police responding to reports of a stabbing found Oliver, who was autistic, just before 4pm on Sunday at Bugs Bottom fields, a managed wildlife conservation area covering nearly six hectares of meadows. The area is popular with dog-walkers, joggers and families. Five suspects were arrested shortly after. Two other boys, both aged 13, have been released on bail, with strict conditions, until 1 February. In a statement issued through police, Oliver’s family described the youngster, known as Olly, as “an enigma” and said he “could get his own way with a wry smile and a cheeky grin”. They said: “He always stood his ground and fought for the underdog while having an amazing depth of love, warmth and wit. In his final moments he must have been terrified. Fighting to get home, he had everything to live for. We now have only memories. An Olly-sized hole has been left in our hearts.” The family described the ordeal as “every parent’s worst nightmare”.