- The baby was seen on CCTV vision happy and well the afternoon before she died
- A post mortem examination and later inquiries led detectives to believe it was suspicious
- Police want to hear from anyone who saw the family at Buranda shopping centre on November 15
Detectives have been speaking to the mother of a five-month-old girl whose death last month in Brisbane is now being treated as suspicious.
The baby girl was found unconscious and not breathing at the family's home at a unit complex in King Street in Annerley on the morning of November 16 after the mother called triple-0.
The baby was pronounced dead by paramedics upon their arrival at the unit.
Detective Acting Inspector Rod Watts says the two parents were seen with the baby in the nearby Buranda shopping centre the afternoon before the baby's death.
"The baby appeared happy and healthy, something has happened between then and 8:00am the following morning, where the baby was found unresponsive," he said.
Acting Inspector Watts said police did not immediately consider the death to be suspicious, but began investigating after results from the post mortem examination, two days after the death.
"A number of inquiries have to be conducted, investigations have to be sure of where we are, the medical evidence takes time … it's taken some time to get to this point," said Mr Watts.
He said the 32-year-old woman lived in the unit complex where the baby lived and was found, and that no-one had visited the unit in the hours between when the family were seen out and when paramedics arrived.
Acting Inspector Watts said the family no longer lived at the complex and were not known to police or child protective services.
"There's a very small circle of people involved … it's a tight-knit community or family," he said.
Police from Morningside child protection and investigation unit and specialist police from the child trauma unit are investigating.
Acting Inspector Watts has asked neighbours, family or anyone who saw the family while out to contact police.
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