Autopsies on the bodies of Sarah Smith and her children, Phoenix and Genuine, have revealed that they all died of blunt-force trauma.
The autopsies were done at the Scarborough General Hospital Mortuary yesterday, almost three weeks after their deaths.
Police told Guardian Media that although the results of the autopsies may raise questions, the deaths have not been reclassified and remain unclassified.
However, they said with the autopsies now completed, Tobago investigators had started a probe to determine if the blunt-force trauma was caused by the fall or if someone caused it, leading to their deaths.
Sources told Guardian Media the post-mortem revealed all three deceased sustained blunt-force trauma to their heads.
They were found dead in a decommissioned WASA tank in Parlatuvier on September 10, after being reported missing days before.
A foul odour from the tank led police in the area to their bodies during a search operation.
Smith, originally from Trinidad, had moved to Tobago seeking a better life. A close friend reported that she became depressed after her business failed and she was evicted from her apartment.
Her mother, Jacqueline Wayne, who reported her missing, reported that she noticed unusual behaviour from Sarah, including complaints of hearing voices and her walking naked through the community, before they went missing.
Police told Guardian Media yesterday they would leave no stone unturned in their investigations.