Queensland police spark anger with 'open mind' comment on murder of Hannah Clarke and children

Domestic violence campaigners appalled force wants to consider suggestions Rowan Baxter was 'driven too far' when he set fire to his family in their car in Brisbane

Queensland police have revealed that a man who killed his wife and three children by dousing them with petrol and setting them alight had a history of domestic violence and was known to them.

But in comments that have shocked domestic violence campaigners, the force says they are keeping an "open mind" about suggestions the 42-year-old Rowan Baxter had been "driven too far" and are appealing to people who knew the couple to come forward to understand his motives.