when Hennells threatened staff in Tesco with a knife of approximately 13 . 5 minutes before the raid he posted details of his intent on robbery . Four hours earlier he had posted a photograph of a knife , and then ' liked ' it . He fled the scene with £ 410 to a nearby pub where he was robbed . Hennells , of Gaywood , King 's Lynn , Norfolk pleaded guilty to robbery . He also pleaded guilty to possession of a knife as an offensive weapon . He was remanded for sentencing next month by Norfolk Crown Court . Police admitted that the Facebook post made the case far easier to prove .
Andrew Hennells threatened staff in Tesco with a knife of February 13 . 15 minutes before the raid he posted details of his plan on Facebook . Four hours earlier he had posted a photograph of a knife , and then 'liked ' it . He fled the scene with £410 to a nearby pub where he was arrested . Hennells , of Gaywood , King 's Lynn , Norfolk pleaded guilty to robbery . He also pleaded guilty to possession of a knife as an offensive weapon . He was remanded for sentencing next month by Norfolk Crown Court . Police admitted that the Facebook post made the case far easier to prove .