Complex sentence: Sam, who now believes that Joanna and Cort murdered Clint rides out to find his house set ablaze, when the fire is extinguished, there is no trace of a body inside the house anywhere.
Split into simpler sentences: Sam, who now believes that Joanna and Cort murdered Clint rides out to find his house set ablaze. When the fire is extinguished, there is no trace of a body inside the house anywhere.