Complex sentence: After telephoning her father at 3:47pm to tell him she would be home in half an hour, Dowler set off for home on foot, and was last seen, by a friend waiting at a bus stop, 18 minutes later walking along Station Approach.
Split into simpler sentences: After telephoning her father at 3:47 pm to say she would be home in half an hour, she left on foot. She was last seen by a friend waiting at a bus stop 18 minutes later walking along Station Approach.