Complex sentence: Assistant State's Attorney Rhonda Pearlman began a series of grand jury depositions to prepare evidence to prosecute Davis, with one of the key witnesses being Davis' driver, Damien Lavelle "Day Day" Price.
Split into simpler sentences: Assistant State's Attorney Rhonda Pearlman begins a series of Grand Jury depositions to prepare evidence to prosecute Davis. One of the witnesses is Davis' driver Damien Lavelle "Day Day" Price.