The judge granted Swain about two years credit for time served.
The 53-year-old is to serve his sentence at Her Majesty’s Prison at Balsam Ghut on Tortola, a mountainous island about 90 miles east of Puerto Rico.
A jury unanimously convicted Swain on Oct. 27 of murdering Shelley Tyre in what authorities portrayed as a near-perfect crime.
Tyre’s drowning near an isolated shipwreck at a depth of 80 feet was initially ruled an accident, but authorities in the British Virgin Islands charged Swain with murder after a 2006 civil trial in Rhode Island found him responsible for her death.
The civil jury awarded Tyre’s family $3.5 million; Swain filed for bankruptcy and has not paid the sum.
In the criminal trial, prosecutors argued that Swain killed Tyre to pursue a romance with another woman and get his wife’s money.
Swain’s lawyers plan to appeal the verdict.
No eyewitnesses or DNA evidence linked Swain to the murder. The prosecution’s case rested largely on specialists who testified they believed Swain wrestled his wife from behind, tore off her scuba mask, and shut off her air supply while they swam near the shipwreck. Her mask was damaged, the mouthpiece of her snorkel was missing, and her fin was found embedded in a sandbar - all signs of a struggle, prosecution witnesses said.
The defense called it a weak case that lacked physical evidence and was built on speculative theories and circumstantial evidence designed to roil the emotions of the jury.
