article_snippet: Andrew Hennells, pictured, posted a message on Facebook admitting Andrew Hennells plans to rob a Tesco supermarket 15 minutes before holding up staff .
article_snippet: An armed raider threatened staff at a Tesco supermarket with a knife less than fifteen minutes after Andrew Hennells boasted on Facebook that Andrew Hennells was going to rob the store.
article_snippet: Andrew Hennells, 31, of Gaywood, King's Lynn posted the message 'Doing.
article_snippet: Withing a quarter of an hour, Norfolk Police received an emergency call that a man brandishing a knife was demanding cash from staff at a Tesco supermarket.
article_snippet: Hennells also posted on Facebook hours before carrying out the robbery that Hennells had 'shared' a Bare Knuckles Gypsies' 'The hardest man in Ireland' video.
article_snippet: Hennells posted this message only 15 minutes before threatening staff at Tesco's in King's Lynn .
article_snippet: Hennells held up staff at the Tesco store in King's Lynn, pictured on Friday, February 13 last .
highlights_snippet: Andrew Hennells threatened staff in Tesco with a knife of February 13 .
  