Dangerous Depths

Description for DANGEROUS DEPTHS by Kathy Brandt:

FIRE AND WATER

I'd come to the British Virgin Islands to escape. As a police diver and underwater investigator, I figured tropical waters and an island paradise beat murky, polluted city lakes any day. When I left Denver, my former partner in homicide warned me--"ain't no such thing as paradise, Sampson." Darned if he hadn't been right...

Trying to save an endangered species doesn't normally target one for extinction. But homicide detective Hannah Sampson has her doubts when she pulls Elyse Henry--her close friend and neighbor--out of a fiery sea. While the chief of police believes the explosion on Elyse's boat was an accident, Hannah is sure it's a case of attempted murder. She's seen her friend in action. A staunch environmentalist, Elyse never hesitated to harass anyone who threatened her beloved natural habitat. With Elyse in the hospital fighting for her life, Hannah is determined to find her would be killer before he returns to finish the job...

This is #3 in An Underwater Investigation