Complex sentence: Before driving off, Ray pauses and apologizes for the accident that killed Graham's wife, and says he panicked, and was unsure what to do or who else to call, and tells him that he has trapped one of the aliens in his home.
Split into simpler sentences: Before driving off, Ray pauses and apologizes for the accident that killed Graham's wife, and says he panicked, and was unsure what to do or who else to call. Just before driving off, Ray tells Graham that he has trapped one of the aliens in his home.