Complex sentence: At approximately 6:20 am on September 2,2003, Johnson took the murder weapon, a Winchester rifle from the guest house, walked into her parents' bedroom and then shot her sleeping mother in the head.
Split into simpler sentences: At approximately 6:20 am on September 2,2003, Johnson took the murder weapon, a Winchester rifle from the guest house. She then walked into her parents' bedroom and then shot her sleeping mother in the head.