Families who suspect their loved ones were early victims of Ivan Milat have described the roadblocks and missed opportunities in their quest to find answers.
The family of Keren Rowland, who was found dead after disappearing one night in the early 1970s, believe she may have been the first victim of the notorious serial killer.
They argue if police had made the connection early on, he could have been stopped much earlier in his lethal campaign.
Ms Rowland's younger brother Steve appeared on Thursday at a NSW parliamentary inquiry into unsolved murders and missing persons cases between 1965 and 2010.
"We have and will continue to search for answers, but we're finding it incredibly difficult to get the same support and help from the investigating authorities," he told the committee.
