Rowan Baxter, 42, blamed his estranged wife Hannah Clarke, 31, when police confronted him with a police protection order to stay away from her and their three children.
The suspected murder-suicide of a mother, 40, and two young children - a girl, 10, and boy, eight - is the latest in a disturbing list of similar tragedies that have shocked Australia in recent years.
Hannah Clarke, 31, and her children Aaliyah, six, Laianah, four, and Trey, three, died after their car was set alight in Camp Hill in Brisbane s south in February 2020.