Force, Marie. Fatal series.

"The story breaks as Metro PD lieutenant Sam Holland attends a dinner party with her husband, Vice President Nick Cappuano: President Nelson is accused of having an affair. More shocking still, campaign staffer Tara Weber claims the president fathered her newborn son--while the First Lady was undergoing secret cancer treatment. When a high-profile murder case hits Sam's desk, she's shocked to uncover a connection to the presidential scandal. With the department caught up in its own internal scandals, and the chief's job hanging by a thread, Sam questions who she can trust as her team uncovers information that clouds an already-murky case. And with calls for the president to resign getting louder by the minute, Sam needs to close this case before she finds herself living at 1600 Pennsylvania Avenue..."--Provided by publisher