Mason Lee’s stepfather given nine years jail for manslaughter

THE man who killed Queensland toddler Mason Jet Lee has been sentenced to nine years in jail for manslaughter.

William O’Sullivan, 37, last week pleaded guilty to four charges in Brisbane’s Supreme Court, including manslaughter and cruelty to a child under 16.

Mason was just 21 months old when he died a “slow and painful death” in June 2016, the Supreme Court heard.


O’Sullivan was Mason’s stepfather and primary carer at the time and confessed to delivering the “heavy blow” that ruptured the little boy’s intestines and ultimately led to his death.

His mother Anne-Maree Lee was living in a seperate home about one kilometre away and is still yet to face court in a judge-only trial.

The court heard O’Sullivan failed to help Mason, who succumbed to sepsis and died several days later on June 11.

The court was also told an autopsy had identified widespread bruising to Mason’s forehead, chest and abdomen, a broken tailbone, and traces of methamphetamine in his blood.

Just six months earlier, the toddler had been diagnosed with a broken leg, ulcers and a rare dermatitis.

O’Sullivan, who was addicted to meth and referred to himself as a “crackhead” and “junkie”, was sentenced to nine years in jail for manslaughter on Thursday.

With time already served, the 37-year-old will be eligible for parole in just four years.

Jaydan is a Digital News Producer at He was appointed Managing Editor of the Junee Southern Cross newspaper at the age of 17 and has since held positions in a number of newsrooms in New South Wales and Queensland. Jaydan joined the Hot Tomato Broadcasting Company in 2013 and has been keeping the Gold Coast up to date with the latest local, national and international news online at ever since. With almost ten years’ experience in both print and digital media Jaydan is committed to providing the best coverage during major news and weather events.

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Give the guy the noose. 9 years is no way enough time for someone who killed a defensless inocent child. The court system sucks.