Western Australian Premier Roger Cook has vowed the state will have ‘the toughest gun laws in Australia’ after Perth mum Jennifer Petelczyc and her daughter Gretel were killed in their home on Friday. Western Australian Premier Roger Cook has vowed the state will have ‘the toughest gun laws in Australia’ after Perth mum Jennifer Petelczyc and her daughter Gretel were killed in their home on Friday. National Sydney Morning Herald – Latest News