Deception Pass (1997)

Amazon.com Product Description (ISBN 0345400690, Mass Market Paperback)

As a rebellious teen, Lainie Smith hooked up with a drifter named Charlie--and she may have been an eyewitness to murder in the shadow of cliff-walled Deception Pass, where the water runs river-swift and turbulent. When justice-- and the executioner--finally caught up with Charlie, Lainie was long gone.

But somebody who knows the truth--the whole truth--about Lainie's dark history is blackmailing her. Lainie won't tell P. I. Thomas Black why she's being blackmailed, only that her tormentor "knows things he cannot possibly know." Just how far will Black's saintlike client go to bury her past forever?