The prosecution has lined up 59 witnesses to testify in the case.
The charges include conflict of interest and money laundering.
The hearing of a graft case against former Migori governor Okoth Obado and his children will begin on Tuesday morning after it was adjourned on Monday following a hitch over some documentation to be used in the trial.
Mr Obado has been charged alongside his four children and 11 other persons with misappropriation of public funds and conflict of interest over millions awarded for tenders given to several companies by the Migori county government during his tenure as the county boss.