The Night Season by Chelsea Cain

A city on flood alert, a killer on the rampage Heavy rains have burst the banks of the Willamette River; several people have died in the furiously rising waters but the latest victim didn't drown: She was killed before she went into the water. Soon, other victims are found, and Police Detective Archie Sheridan realizes that Portland has a new serial killer on its hands. Reporter Susan Ward is on the story, but she's also got other leads to chase, and some secrets can be too frightening for prying eyes with Archie following a bizarre trail of evidence, and Susan close behind, the pair must unearth the identity of a vicious murderer, and uncover the truth behind a mystery more than sixty years old.

Damn, I wish I'd written this book review before my holiday ... Now I'm trying to remember what the book was about. Oh yes, I enjoyed it. It was a pretty standard murder solving sort tho.