A man on trial for three murders told a cellmate he had "roughed up" a Mount Gambier man who was later found dead, a court has been told.
Mildura man Steven Leslie Hainsworth, 49, is on trial in the South Australian Supreme Court charged with the murders of Phyllis Harrison, 71, at Elizabeth South in 1998, Beverley Hanley, 64, at Elizabeth North in 2010 and Stephen Newton, 55, at Mt Gambier in 2011.
