National leader Charles Blunt loses his northern New South Wales seat of Richmond, largely on anti-nuclear Helen Caldicott's preferences. In North Sydney, popular ex-mayor Ted Mack becomes the first genuine Independent to win a House seat since World War II. The number of Australian Democrats Senators increases to 8. 25 March – A bomb and poison attack is instigated against an Adelaide poultry processing plant. 26 March – Finance Minister Senator Peter Walsh makes unflattering remarks about poll-driven policies having undermined the careful work of Cabinet's Economic Review Committee and declines to stay in the Ministry. April 3 April – The Liberal Party of Australia leadership spill, 1990 takes place, with Dr. John Hewson being elected as Leader, and Peter Reith as Deputy Leader of the Federal Liberal Party. The fourth Hawke Ministry is announced – Treasurer Paul Keating replaces the retired Lionel Bowen as Deputy Prime Minister, Senator Graham Richardson transfers from the Environment portfolio to Social Security and the centre left faction loses out in the extensive reshuffle. The South Australian Government releases its final report on the Murder of George Duncan finding that there was insufficient evidence to charge any person with the murder which took place on 10 May 1972. 11 April – Tim Fischer unexpectedly beats John Sharp for the leadership of the National Party of Australia. He pledges to restore his party's traditional base in rural and provincial Australia. May The 80 Series Toyota Land Cruiser goes on sale in Australia for the first time. It is considered to be the greatest 4WD ever built. 6 May – Six people die in the Cowan rail accident, when a CityRail Interurban train collides with a 3801 Limited steam locomotive on the banks of the Hawkesbury River in New South Wales. 14 May – A bitter public row between Paul Keating and John Button over tariff policy leads critics to cast further doubt on Prime Minister Bob Hawke's ability to discipline his ministers. 21 May – The Federal Government rejects calls from the New South Wales Government for a Royal Commission into the Mafia and its alleged links to the assassination of Police Chief Colin Winchester. June 8 June – Two major Queensland firms involved in the building industry collapse, costing hundreds of jobs and leaving projects worth millions of dollars in jeopardy. 10 June – The Federal Health Minister announces that Medicare is to be