Grandmother Carmen Ramjattan, 70, was beaten on the head by her killer in an assault so vicious that her spinal column was fractured.
Ramjattan died of bleeding from massive injuries from blunt-force trauma to the head, pathologist Dr Eslyn McDonald-Burris concluded during an autopsy on Thursday.
The pathologist also recorded multiple fractures to the spine.
Ramjattan, the mother of four and grandmother of four, was found dead on Wednesday night in her house in the affluent community at Sunkist Drive, Phillipine, not far from the private residence of Prime Minister Kamla Persad-Bissessar.
Ramjattan lived alone and police suspect the killer entered the house through a window at the back on the house, and pounced on the woman when she returned from church on Wednesday afternoon.
Ramjattan's son, Dennis, discovered the body. He called police officers before entering the house.
Her body was in a bathroom with hands tied behind her back with rope.
Dennis, who resides at Diego Martin, had gone to check on his mother after phone calls to her cellphone went unanswered for several hours Wednesday.
Neighbours who went to check on the house said the front gate was open and her gold Nissan Almera car was missing from the driveway.
A man, of Rambert Village, near La Romaine, was detained in connection with her killing on Thursday evening.
Police said the suspect was found driving Ramjattan's car along M2 Ring Road, Debe.
Ramjattan's car was fitted with a Car Search tracking system, which assisted the police.
The suspect remained in police custody yesterday.