Long Bright River – Liz Moore

Mickey is a patrol officer with the Philadelphia Police Department. Her routine patrol activities include searching for her sister Kacey, an addict and sex worker who is missing.  And there is a serial killer preying on young women. Overall a gritty relationship story: there are no completely good guys. Mickey in particular is deeply flawed and makes bad decisions. The plot is seductively delicious with a lot of misdirection. Thanks Amy, for this recommendation.