The family of Mayaro mother Krystal Primus-Espinoza want answers as to what happened to lead to her body being found off a cliff at Toco.
Ricardo Primus, her brother, said he believed that his sister was murdered.
Primus denied that his sister suicidal, and instead said she was a jolly and family-oriented person.
The brother spoke to the Express via phone as he awaited the autopsy to be done at the Forensic Sciences Centre, St James, on Friday morning.
Primus-Espinoza, 36, was found footsteps away from her crashed Toyota Hilux.
Police believe the vehicle crashed off a cliff near Balandra.
The vehicle, which appeared to have nosed dived in sand, was discovered by a passerby on Thursday morning.