Chilling CCTV footage from an Asda store caught the moment cold-blooded Leeds killer Satpreet Singh Gandhi bought the knife which he used to stab his wife to death.br br The 37-year-old was in the Kirkstall Road shop a week before he carried out the bloody murder of his estranged partner and mother-of-two, Harleen Kaur Satpreet Gandhi, in revenge for leaving him.br br He was handed a life sentence at Leeds Crown Court today and told he must serve at least 23 years and four months.