Police are renewing appeals for information on Mr Collier's disappearance as part of this year's 'Answers Still Matter' Missing Persons Week. "Peter lived a quiet, private life, but he was still our brother - someone we loved deeply. Police said Mr Collier lived a "transient life" in different locations between Victoria and NSW. Missing Persons Week is an annual national campaign to raise awareness of the issues and impacts surrounding missing persons and runs from Sunday, August 2 until Saturday, August 8. "Peter Collier has been missing for many years, and our commitment to establishing what happened to him has not diminished.