The jury in the Scott Guy murder trial has been told not to consider the case as a 'whodunnit' .
Justice Simon France has begun his summing up in the trial for murder accused Ewen Macdonald.
He's told the jury they're not scientists or a commission of inquiry and must base their decision only on the evidence they've been presented with.
"This case has been popularly described as a 'whodunnit', but it's not and you should put that idea to one side. What this case is, and all it is, is an allegation that Mr Macdonald killed Mr Guy - it's no wider than that."
Justice France says it's not enough for the jury to think Ewen Macdonald is 'probably' guilty and has stressed he must be presumed innocent.
Photo: Ewen Macdonald (NZ Herald)