Five Humberside officers - Constables Nigel Thomas Dawson, 39, Neil Blakey, 42, Mark Ellerington, 36, and Matthew Barr, 38, and custody Sergeant John Dunn, 40 - deny the manslaughter of Mr Alder.
Five officers - Sgt John Dunn and Pcs Neil Blakey, Mark Ellerington, Nigel Dawson and Matthew Barr - were cleared of Mr Alder's manslaughter and misconduct in 2002, even though an inquest had concluded that he was unlawfully killed.