As police continue to seek out information from the public about two Saudi-born sisters who mysteriously died in Sydney's southwest, there is a tool authorities haven't used yet that some say could be key to solving the case.
NSW Police renewed their appeal for information to the public over a week ago, releasing the names and photographs of Amaal, 23, and Asra Abdullah Alsehli, 24, to encourage anyone to come forward with details that could assist the investigation into their deaths.