Peter Dupas is an Australian serial killer known for his brutal crimes in the 1990s. He was convicted of murdering three women, with his first known victim being Maryann D'Angelo in 1997. Dupas was sentenced to life in prison without the possibility of parole. Dupas's criminal activities involved violent assaults and sexual offenses, which led to widespread media attention and public fear. His case highlighted issues related to criminal psychology and the challenges of preventing violent crime. Dupas remains a notorious figure in Australia's criminal history.