I do not think this is true.

I think that the person who posted on negril.com got the stories confused with this one I saw on the RJR site
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Police make breakthrough in bodies found in cave PDF Print
Monday, 06 October 2008
Two months after the bodies of a man and a woman were found in a cave in Springvale, St. Elizabeth the police have made a breakthrough.

Terry Foster, 26, otherwise called Andrew of Glendevon St. James and Springvale, St. Elizabeth has been charged with two counts of murder.

Mr. Foster has been charged with the murder of Jerome Miller, 26, otherwise called "Amoy" and Sherida Morris, 24, both from St James.

The bodies of the two were found in the cave on August 7.

A farmer who found the bodies said he noticed blood stains in his yard and followed it to the cave.

On the evening of August 6 residents reported hearing loud explosions.

They also say they spotted a car leaving the area in a hurry.

The Police believe that Mr. Miller and Miss Morris were taken from St. James to St. Elizabeth where they were killed and their bodies dumped.

Source: http://www.radiojamaica.com/content/view/12195/26/