Complex sentence: Viola was the sister of Vaughn's girlfriend and Vaughn Ross shot and killed both victims later the same day a mountain biker came across the murder scene and found both Douglas and Viola in a car, shot multiple times.
Split into simpler sentences: Viola was the sister of Vaughn's girlfriend and Vaughn Ross shot and killed both victims. Later the same day a mountain biker came across the murder scene and found both Douglas and Viola in a car, shot multiple times.