Adams, of Mary's Hill, was found dead at about 3:30am in Courland, Tobago.
She had been reported missing only three hours earlier after she failed to return home after a lime with a male friend, and was not answering phone calls.
A post mortem performed by Dr Valery Alexandrov in Tobago on Thursday has confirmed that the teenager was stabbed repeatedly with a broken object to the front of the neck.
The object, which is said to be a broken piece of glass, cut vital organs and tendons in the girl's neck, resulting in her bleeding out.
The autopsy also revealed that there was no evidence to indicate the teen was sexually assaulted before or after she was murdered.
However, DNA samples and swabs have been taken and are expected to be sent for forensic testing for further analysis.
Police currently have one person in custody for the incident.
Investigators are expected to approach officials at the Director of Public Prosecution’s (DPP) for instructions on how to proceed.