The prosecution says that it did not show the defense all of its evidence, an apparent error that became evident when prosecutors began to lay out their case Wednesday.
The apparent differences between Dr Reid and Mr Dewar were further evident in autumn 1999 when it was reported that there was "open hostility" between the pair at the Labour Party conference in Bournemouth.
Such "hidden" hearing loss, not evident in the audiogram (a test that measures hearing sensitivity), is also apparent in human listeners who experience persistent tinnitus, but otherwise normal sensitivity.