What is the setting of Dead in the Water: A Novel by Stuart Woods?

The novel is set in St. Marks. St. Marks is a small island in the Caribbean that was once a colony of Britain but gained its freedom in the sixties. This island still has a government and legal system that is similar to the British systems with some changes that the people of St. Marks feels that were unimportant. This has created a system in which a person can be charged and convicted of a crime with very little evidence against them.