Shopkeeper stabbed to death as he sorted the Sunday papers

A masked robber described as a ‘one man crime wave’ was caught on CCTV stabbing a shopkeeper to death during a three-week crime spree, a court heard. Alex Gunn, 31, allegedly knifed 54-year-old Ravi Katharkamar to deathas he opened Marsh Food and Wine in Pinner, northwest London, on 24 March. Shocking footage played to jurors shows the killer creeping up on Mr Katharkamar from behind before attacking him and wrenching the cash till from his hands. The masked figure then…