Ice cold heart - P.J. Tracy (Monkeewrench #10)

Goodreads 4.13

On a bitterly cold winter night, Kelly Ramage leaves her suburban home, telling her husband she's going to meet a friend.

She never comes back.

When her body is discovered, murdered in what seems to be a sex game gone horribly wrong, Detectives Gino and Magozzi take the case, expecting to find a flirtatious trail leading straight to the killer.

However, Kelly's sinister lover has done a disturbingly good job of hiding his identity. This isn't his first victim - and that she won't be the last...