Air Dance Iguana by Tom Corcoran. This isn't the first book in the series, but I didn't find it difficult to get acquainted with the characters. Key West is such a unique place and I enjoyed the mystery. I'll be adding Tom Corcoran to my list of TBR authors.
Summary from the author's web page: Two men, twenty miles apart, are killed in the same strange way on a quiet summer morning in the Florida Keys. Forensic photographer Alex Rutledge finds that he may be the only person interested in pursuing justice, especially when his brother becomes a key suspect.Alex connects the current-day murders to a thirty-year-old scam amidst revenge smoldering since the Nixon years. He races time to thwart a final killing and, if possible, to prove his brother's innocence.
In my quest to stick to my budget this year, the book was borrowed from the library.