Red Light — T. Jefferson Parker

Merci Rayborn is back.

It's two years after the death of Tim Hess, her partner and the father of her child, and Merci is working hard to hold it all together. She and her son are living with her father. She's also dating Mike McNally, a respected fellow officer.

But everything explodes when a young prostitute is found brutally murdered and Mike emerges as the primary suspect. The lead investigator on the case, Merci must do the unthinkable - expose and arrest her lover. Sifting through the clues with a growing sense of panic and outrage in her gut, Merci has to work hard to balance where the truth is leading her against where her heart is telling her to go. Meanwhile, an old unsolved case from the sixties is thrown on her desk - the murder of Patti Bailey, another prostitute with ties to the force - and the two cases conspire to turn Merci's world upside down.