25-year-old man, Allen Douglas Thompson, is serving four life sentences for murdering four members of a family in Hemmings Cres ACT, Richardson (Radmila Milosevic, her de facto husband, Anthony Baker, and their children Daniel Baker, 4, and Lisa Baker, 2) in March 1984 was convicted in the ACT Supreme Court on 24 Oct 1984 of two more counts of murder. Mr Allen Douglas Thompson, who pleaded not guilty to murdering his girlfriend Mirjana Milosevic, aged 17, and her sister Ljiljana Milosevic, 14, in 1981, appeared indifferent as the verdicts were returned.

On the 31^st of March 1984, the Milosevic family including Radmila ‘Rad’ and her husband Tony, as well as their young daughter and son were found dead in their home. They had received gunshot wounds and unsuccessful attempts were made to ignite the bodies and home.

Close family friend and boyfriend of Rad’s sister (who had died in a car accident with her other sister 2 years earlier) Alan ‘Tomo’ Thompson was seen near the crime scene. A 22 calibre rifle was found at his home and was identified as the one used in the crime. At trial he pleaded not guilty but was found guilty and charged with 4 concurrent life sentences.

Authorities were alerted to his involvement in the car crash of his girlfriend and her sister. As the driver, Thompson escaped with minor burns and claimed the car almost instantly ignited and killed the 2 sisters. Examination of photographic evidence of the car, a staged accident and replicate fire conducted by police, showed that the crash damage was insufficient to match Thompson’s story. Police also proved that at the car’s travelling speed, the fire would have had to be started by dousing the car in a significant amount of petrol.

  
Allen Douglas Thompson

Photographs of the bodies showed exit and entry wounds in the skull, consistent with being shot in the head. Police exhumed the bodies to find any remaining evidence, and it was found the girls were shot with a 22 calibre rifle. A lack of internal airway injuries proved that the sisters were dead prior to the vehicle fire. Thompson was consequently charged with the sister’s murders, and given a life sentence for each, to be served concurrently with the life sentences already given.

   Thompson found guilty of 1981 murders - Canberra Times

    Thompson, now 60, will never be released from jail.  He has been behind bars for 37 years. Based on the average annual cost of Maximum Security Incarceration in 2020, should Thompson live another 15 years to 75, his jail incarceration of 52 years will have cost the ACT taxpayer $9.1 million circa ($175,000 p.a. X 52 years).