Joseph "Sef" Claridades Gonzales (born 16 September 1980) is a Filipino Australian murderer who was convicted and sentenced to life imprisonment for the July 2001 murders of his father Teodoro "Teddy" Gonzales (46), his mother Mary Loiva Gonzales (43), and his sister Clodine Gonzales (18), in Sydney, New South Wales, Australia. As a result of notoriety surrounding the sale of the house where the crimes occurred, the New South Wales government made it illegal to not disclose information related to the history of a property. The family settled in Sydney, New South Wales, and by the late 1990s, Teddy had requalified as a lawyer, set up a successful law firm specialising in immigration, and purchased a plot of land in North Ryde.

The Gonzales family appeared to be close-knit: the parents, however, were devout Catholics who had high hopes and strict expectations for their children. In particular, they had hoped their son would perform well academically, give up his musical and singing aspirations, and embark on a career in medicine or law. After attending Parramatta Marist High School, Gonzales studied medical science at the University of New South Wales but withdrew after two years. There he compressed her neck while trying to strangle her, struck her head with the bat at least six times, and then stabbed her multiple times with the smaller of the knives. Gonzales then waited until Loiva arrived home at about 5:30p.m. After she entered the house, he attacked her with one of the kitchen knives in the living/dining room, inflicting multiple stab wounds and cuts to her face, neck, chest and abdomen. Her windpipe was then completely transected post-mortem. Gonzales also told relatives that he had a brain tumour and asked his godmother in the Philippines for A$190,000 for the alleged surgery, but she did not give him any money. It was found that he had committed the murders because he was fearful that, because of his poor performance in his university studies, his parents might take his car away from him and might withdraw other privileges which had been granted to him, and that he wished to be the sole beneficiary of his parents' property.

On 20 May 2004, Gonzales was found guilty of all four charges. He was sentenced on 17 September 2004 to three concurrent life sentences without parole for the murders. Justice Bruce James remarked that, "I consider that the murders show features of very great heinousness and that there are no facts mitigating the objective seriousness of the murders and hence the murders fall within the worst category of cases of murder at common law." On 27 November 2007, the appeal was dismissed as there had been no miscarriage of justice, and his convictions remained.

In March 2021, Gonzales failed in his third attempt to get a special inquiry into his convictions for the murders. Previous applications for a special inquiry into his convictions were dismissed in 2018 and 2019.

In August 2025, Gonzales won the right to appeal due to the investigators' discovery of his post-traumatic stress disorder (PTSD), a disorder which Gonzales himself had previously refused to acknowledge in the original murder trial.

House sale

The North Ryde house, located at 6 Collins Street and built by the Gonzales family in 2000, was put on the market shortly after the murders but due to its notoriety, it remained unsold for three years. Its eventual sale aroused controversy in October 2004 when prospective buyers, a couple from Taiwan, agreed to purchase the property. However, they had not been informed of the events that took place there by the realtors, LJ Hooker, only finding them out from a newspaper.

LJ Hooker initially refused to reverse the sale as they had no legal obligation of disclosure, but eventually refunded the buyers' A$80,000 deposit due to the bad publicity it caused. The company was also fined A$21,000 by the NSW Office of Fair Trading. After this incident, the NSW government made it illegal to "fail to disclose information that could have a substantial impact on the value of a property". In November 2005, the house was sold for A$720,000 (A$80,000 less than the previous price) to a buyer who was informed of its history.

See also

  • Bart Whitaker – a man who ordered a hit on his family after faking attending a university
  • Lyle and Erik Menendez – American brothers convicted of killing their parents in 1989
  • Elizabeth Haysom – a dual Canadian-American woman ordered her boyfriend of killing her parents in 1985
  • Richardson family murders – a 12-year old minor ordered her partner of killing her family in 2006
  • Jennifer Pan
  • Lin family murders (Australia)
  • Raymond Childs III

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