A teenager charged over the death of Queensland toddler Mason Jet Lee might have been there when the child suffered a critical blow, a court has heard.
Ryan Robert Barry Hodson was charged in July last year with the manslaughter of 22-month-old Mason, who died from severe injuries in Caboolture on June 11, 2016.
A successful bail bid in the Brisbane Supreme Court on Monday heard it was now also alleged the 18-year-old may have been there when a significant blow was dealt to the young boy.
"The crown case now is not being put against Mr Hodson just on the basis of failing to provide care and the necessaries of life," Justice Debra Mullins summarised during the hearing.
"It's put (also) on the basis ... that Mr Hodson may have been there when a blow was administered to the victim."
But the court also heard there was "no direct evidence" pointing to who was responsible for the critical blow to Mason's abdomen, or when the injury occurred.
Nevertheless, crown prosecutor Vicky Loury maintained there was a "compelling" case against Hodson, including CCTV footage demonstrating he was alone with Mason on the day he died.
"We do have evidence of this man threatening to injure the child," Ms Loury added.
Justice Mullins noted Hodson had already spent 95 days in custody and granted him bail on conditions including "random" visits by police to ensure he was meeting a curfew.
She added it was "surprising" police had moved to revoke Hodson's Supreme Court bail in a lower court, despite the fact he experienced "some difficulties" complying with conditions set in August 2016.
Intellectual testing had not been undertaken and could be relevant to his conduct before bail was revoked, defence barrister Scott Lynch said.
"At the end of the day, he needs to be occupied," he added.
Hodson denies Mason was ever put in his care during the three weeks before his death, during which time he lived with co-accused William Andrew O'Sullivan.
O'Sullivan and Mason's mother Anne Maree Lee remain in custody charged with manslaughter and cruelty to children.