Ms Zablocka's body was found buried under hardstanding in the garden of a home the two women later shared in Derby in June last year. On Thursday, Ms Zablocka's mother Bozena Kopcynska recalled the last time she spoke to her daughter. But Dr Stuart Hamilton said it would have required 'severe force' to have cut through Ms Zablocka's spine bone. Kasia told jurors she spoke to her mother three times a week until the phone calls stopped abruptly in August 2010. She then went to a police station and told officers Ms Zablocka died in an 'accident' during a violent confrontation.