The decomposed body of Jamaican-British national Karen Cleary Brown was discovered in a shallow grave in St Mary on Monday.
Assistant Commissioner Elbert Nelson, head of the Area Two Police, said the man led investigators to where Ms Brown's body was buried.
He said the man, “whose account of her becoming missing was not consistent,” and upon further questioning “he eventually confessed to having killed her.”
According to the online edition of the UK’s Daily Mail newspaper, Ms Brown, who was a hairdresser and beautician, was in Jamaica to manage the construction of her dream house that she planned to share with her partner of 13 years, sales manager Andy Kane.
It says Ms Brown's partner broke the news that the search for the 44-year-old from north London was over.
Mr Kane reportedly confirmed that identification of her body had to be done from her tattoos due to the grisly manner of her murder.
It's reported that detectives began digging in the garden of the property in Boscobel on Monday and by nightfall Mr Kane had confirmed police had found his girlfriend's body.