Dead In The Water, by Stuart Woods is currently $1.99
Harper-Collins
http://www.amazon.com/Dead-Water-Nov.../dp/B000FC11D8
This is from Woods' Stone Barrington series.
"Stone Barrington only wants a winter getaway from the chill of New York in the beautiful, tropical Caribbean paradise of St. Mark's. But what the lawyer and ex-cop gets instead is the chance to defend Allison Manning. The beautiful young woman stands accused of killing her rich husband on board their luxurious yacht and then burying him at sea.
Stone isn't exactly conversant with the island country's law, but this much is clear to him: Allison is being railroaded by the perverse sense of justice of a prosecutor who will do anything to stay in office."