Complex sentence: Later that night, the evil spirit tells Sonny to "kill them all" to which he goes and gets his father's rifle, shoots his father, his mother, his younger sister, his younger brother, and after a chase, finally kills Patricia.
Split into simpler sentences: Later that night, the evil spirit tells Sonny to "kill them all". Sonny goes and gets his father's rifle, shoots his father, his mother, his younger sister, his younger brother; and after a chase, finally kills Patricia.