When the victim arrived "battered and bruised" at the station the defendants pretended to the custodysergeant that he was very violent in his resistance, the court heard.
Five Humberside officers - Constables Nigel Thomas Dawson, 39, Neil Blakey, 42, Mark Ellerington, 36, and Matthew Barr, 38, and custodySergeant John Dunn, 40 - deny the manslaughter of Mr Alder.