article_snippet.sent: A killer who was mistakenly let of jail by bungling prison staff mid-way through a prison van murder trial posted a video of a prison van brandishing a meat cleaver on a prison van Facebook page.
article_snippet.sent: Convicted murderer Martynas Kupstys, pictured, posed on video brandishing a large meat cleaver .
article_snippet.sent: Before the murder in Gainsborough, Lincolnshire, Kupstys posted a video of Kupstys brandishing a large meat cleaver and waving a large meat cleaver at the person behind the camera in a threatening manner.
highlights_snippet.sent: a prison van was on trial in August 2014 at Lincoln Crown Court for murder .
  