Complex sentence: On January 9 1993 Romand killed his wife, both of his children, his parents and the family dog before he set their house alight and took overdose of barbiturates, intending to burn with his home.
Split into simpler sentences: On January 9 1993 Romand killed his wife, both of his children, his parents and the family dog. He then his house alight and took overdose of barbiturates, intending to burn with his home.