Bad Monkey by Carl Hiaasen

There are a couple of things you can count on in a Carl Hiaasen book. One is that the bad guys will be despoiling the environment in some way. Another is that there will be a deranged animal running amok. And finally, that the result will be a wickedly funny book. In “Bad Monkey,” Andrew Yancy has been asked to leave both the Miami-Dade Police and the Monroe County Sheriff's office, and has been hidden away doing restaurant inspections. His predecessor died of Hepatitis and Yancy, who can't stomach another filthy kitchen, has dropped eleven pounds in three weeks.
Then he comes into possession of a human arm, hooked by tourists on a charter fishing boat. The sheriff, who has political ambitions, wants the arm out of his jurisdiction.
Meanwhile, a developer is putting up a huge house right next door to Yancy, and has driven away the tiny Key deer and spoiled Yancy's view. A fun story, where the good guys prevail and the bad guys get what's coming to them.