Bobby Beale killed Lucy Beale in EastEnders by striking her with a jewellery box during a confrontation at their home. Bobby, who was 10 years old at the time, acted out of frustration because Lucy had been causing trouble and making everyone miserable. He hit her with the jewellery box, which inflicted a fatal head injury. After realizing what had happened, Bobby called his adoptive mother Jane for help. Jane covered up the incident by moving Lucy's body to Walford Common and convincing Bobby that he was not responsible for Lucy's death. The truth was revealed months later during the show's 30th anniversary live episodes, and Bobby was eventually charged and sentenced for Lucy's murder