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When Hannah Clarke's estranged husband murdered her and their three young children in Brisbane in February, it was unthinkable to most Australians that someone could be that evil. Or brutal. He doused his family in petrol and set them alight. The crime highlighted the danger and complexity of domestic violence, as does Jacqui Barker's story. She's the victim of frightening abuse which was compounded because police refused to prosecute the man who splashed her with petrol and threatened to light it. But she didn't give up. Jacqui bravely fought back by launching a private criminal prosecution against her ex-partner.

Reporter: Tara Brown

Producer: Thea Dikeos