Keith Lyon Murder Scene

(Left to Right) DI Bill Warner, CID operations of Brighton, Retired Detective Superintendent Jim Marshall, and Detective Supintendent David Gaylor, who is in charge of investigations into the death of school boy Keith Lyon, at the murder scene near Brighton. * The mother of 12-year-old Keith, who was stabbed to death 34 years ago, has made an emotional appeal for new information about his murder. A massive police inquiry was launched when the body of the talented musician and popular schoolboy was found near his Brighton home. But despite the probe - during which 80,000 home visits were made and the fingerprints of 6,000 local schoolboys taken - the killer has never been found. Today, nearly 34 years after Keith's death, detectives relaunched their hunt for the murderer, saying they hoped to "prick the conscience" of anyone with information. (Photo by Peter Jordan - PA Images/PA Images via Getty Images)