Who untied Rosemary LaBianca's hands? As I understand it, Manson and Watson went into the house, rounded up the LaBiancas, tied their hands behind their backs. Manson goes and gets the girls then leaves the scene. The girls go in and take Rosemary into the bedroom. She was untied when she was swinging the lamp at PK and LVH. At what point and why did someone untie her hands? FB .