Complex sentence: Both Genevieve Waite, John's wife at the time, and Michelle Phillips, John's second wife, told the media that they did not believe her claims, however, Chynna Phillips went on record that she did believe Mackenzie was telling the truth.
Split into simpler sentences: Both Genevieve Waite, John's wife at the time, and Michelle Phillips, John's second wife, told the media that they do not believe her claims. However, Chynna Phillips went on record that she did believe Mackenzie was telling the truth.