text: Police said the 43-year-old man was subjected to a "brutal" attack at Century Mill in Farnworth, Bolton, at about 12:00 BST on 9 June.
  He died four days later in hospital.
  Kathryn Colgan, 24, William Coughlan, 25, and Alex Colgan, 28, of Ramsay Avenue, Farnworth, and Ellis Hampson, 19, of Oakfield Drive, Little Hulton, have all been charged with murder.
  The four appeared before Manchester Crown Court and were bailed to return on 11 August.
  A 16-year-old boy who was also arrested on suspicion of murder has been bailed pending further investigation.
target: Four people have been charged with murder over the death of a man who was attacked at a former mill.