Mason Jet Lee.
Mason Jet Lee. Contributed

Accused killer 'rubbed' toddler in vomit, dealt fatal blow

SLAIN Caboolture toddler Mason Jet Lee allegedly had his face "rubbed" into his vomit as punishment and was filling nappies with blood for several days before his tiny body finally gave up.

Disturbing accusations levelled against the 22-month-old's stepfather were detailed in the Brisbane Supreme Court where William Andrew O'Sullivan yesterday failed in his bid for bail.

The 36-year-old, who faces one count of manslaughter, is accused of delivering a "blunt force trauma" injury to Mason's stomach and failing to seek medical care for the toddler as he slowly succumbed to a treatable intestinal tear and subsequent infection.

Mason's mother Anne-Maree Lee and her flatmate Ryan Hodson, 17, are also charged with manslaughter for their alleged failures to seek help for the visibly ill child.

Mr O'Sullivan's lawyer Ruth O'Gorman told the court that while the circumstances surrounding Mason's death were "very distressing", her client did not concede that the case against him was a "strong one".

She said a person, who cannot be named for legal reasons, had offered Mr O'Sullivan accommodation and a $10,000 bail surety and his criminal history did not suggest he would fail to appear at future court dates should he be released.

Crown prosecutor Vicki Loury argued a "compelling body of evidence" supported the allegation that Mr O'Sullivan had delivered the blow which eventually led to Mason's death and that any reasonable person would have realised the toddler needed care almost immediately after he was injured.

A woman wearing a shirt bearing the slogan "accountability for Mason" underneath a photo of the late toddler wept in the gallery as details of his suffering were read out.

The court heard Mr O'Sullivan was told by two people over as many days to take Mason to hospital for his injuries which would have been "survivable" had he seen a doctor sooner.

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Justice Peter Flanagan noted there was evidence of Mr O'Sullivan telling someone he knew that Mason "just spewed all over me on the f**king floor" (and) I rubbed his f**king face in the vomit. He will learn."

When paramedics arrived at the home where Mr O'Sullivan had allegedly been caring for the boy to give his mother "a break", Mason's body "was cold and stiff" and soiled nappies said to contain blood were found at the scene.

Police will also allege Mason's body showed signs of healing fractures, a torn anus and separation of the scalp as a result of having his hair pulled.

Justice Flanagan said that while he accepted Mr O'Sullivan would likely attend court if released, he still posed an unacceptable risk to Ms Lee who he had allegedly contacted just three weeks after being ordered by a court not to do so.

He said information downloaded by police from Mr O'Sullivan's phone, which allegedly exposed threats to shoot people, also made him an unacceptable risk to witnesses in the case and on that basis, together with the "strength of the evidence", bail should be refused.

Mr O'Sullivan was remanded in custody. A trial is not expected to take place until 2018.