The Murder List by Hank Phillippi Ryan

Rachel is a law student married to Jack, a passionate defense attorney, who seeks out high profile murder cases. Their marriage hits the rocky ground when Rachel ends up interning with Jack's arch enemy, Martha a killer prosecutor. This is the first law triangle. There is the second law triangle in Rachel's past legal case as a juror which first pit Jack against Martha. The third law triangle is the murder of Rachel's co-worker when she worked for the Senator where Jack and Martha were against each other as well.  Past and present, defense and prosecution and client, boss and spouse - all connected.  How do you know you are on the right side? How do you know that you aren't being used for your connections?  The author knows her way around a courtroom.  Starts off nice and ends with a gut punch that knocks any legal thriller lover flat.