David Marshall Mevish , 20 , was stabbed to death by Eni , 68 , last November . The pair had become friends six months earlier while David Marshall was out jogging . He stabbed her at her home in the lungs , liver and heart with kitchen knife . Marshall , who previously abused a 14-year-old girl , admitted murder . He must spend at least 20 years behind bars before applying for parole .
Eni Mevish , 20 , was stabbed to death by David Marshall , 68 , last November . The pair had become friends six months earlier while Eni was out jogging . He stabbed her at her home in the lungs , liver and heart with kitchen knife . Marshall , who previously abused a 14-year-old girl , admitted murder . He must spend at least 20 years behind bars before applying for parole .