Complex sentence: At the time, he was living alone in the family home: owing to his recent divorce from Dahmer's mother, Dahmer's father temporarily lived in a nearby motel and his mother had relocated to Chippewa Falls, Wisconsin with his younger brother.
Split into simpler sentences: At the time, he was living alone in the family home. Owing to his recent divorce from Dahmer's mother, Dahmer's father temporarily lived in a nearby motel and his mother had relocated to Chippewa Falls, Wisconsin with his younger brother.