A judge in Tennessee jailed the boy until he is 19, saying in a judgment published by US media that a child murderer cannot be turned loose ‘willy-nilly.’ An 11-year-old boy has been found guilty of murdering an eight-year-old girl after she and her sister refused to let him see their puppies. WATE-TV reports that judge Dennis Roach this week found the boy guilty of first-degree murder and sentenced him to custody in Tennessee until he turns 19. MaKayla Dyer's shooting still shocks town: 'Rest in peace sweet baby' Read more In his order, which WATE posted online, Roach said the state should use all reasonable resources to determine why the boy shot the girl, and he should be treated and rehabilitated so this never happens again. “A child who commits first-degree murder cannot be willy-nilly turned loose into society,” Roach wrote. The boy, who has been identified by US media, was in detention and being evaluated as to where he should be placed, said Rob Johnson, a spokesman for Tennessee’s department of children’s services. “Like any other child who comes into custody, he would need a thorough assessment and evaluation to determine the best placement,” Johnson said. “At this time, it would likely be at an intensive treatment program at one of our private providers.” The boy has five siblings — three brothers and two sisters — who have been placed with relatives and the state, Johnson said. The boy and his victim, eight-year-old MaKayla Dyer, lived in the same mobile home park in White Pine, Tennessee. MaKayla, her 11-year-old sister and another girl, also 11, were playing outside and talking to the boy while he was sitting at his bedroom window on 3 October 2015. He asked the sisters to fetch their puppies, the judge’s order said, and when they refused he got a 12-gauge shotgun and a BB gun and told the girls he had guns. According to the judge’s description of the events, McKayla laughed at him and responded that the guns were not real. The boy “then made certain the gun was loaded, cocked the hammer on the gun and shot the victim just above the heart at a downward trajectory”, the judge wrote. The girl fell backward, “quickly lost consciousness, and was later confirmed dead”, the judge wrote, adding that three witnesses saw McKayla within one minute after she was shot. “The mother of the child knelt on the ground and picked her up, placing her child in her arms as she passed away.” The boy had been trained in firearm safety and had hunted with his father and grandfather, the judge noted.