He retired on 29 November 2007, and was replaced by Judge Jennifer Coate.
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Upon his retirement, Victorian Attorney-General Rob Hulls praised Johnstone for his outstanding commitment to investigating deaths in custody.
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Johnstone will be coming out of retirement in February 2008 for the conclusion of the inquest into the disappearance and death of Louise and Charmian Faulkner who went missing in 1980.
An inquest into Halvagis's death before coroner Graeme Johnstone heard circumstantial evidence in the case against Dupas in relation to the murder;
Graeme Souness | Johnstone Strait | Graeme Garden | Johnstone | Graeme Swann | Graeme Hick | Keith Johnstone | Graeme West | Graeme Blundell | George Johnstone Stoney | Graeme Storm | Graeme Murty | Graeme Hart | Graeme Fowler | Graeme Connors | Derek Johnstone | William Johnstone Hope | William Johnstone | Parker Johnstone | Graeme Smith | Graeme Revell | Graeme Pollock | Graeme Lloyd | Graeme Leung | Graeme Jenkins | Graeme Hughes | Graeme Friedman | Graeme Dott | Graeme Bell | Davey Johnstone |