22 Seconds (Women's Murder Club Series #22) by James Patterson

The #1 New York Times Bestseller! 22 seconds... until Lindsay Boxer loses her badge, or her life. Sfpd Sergeant Lindsay Boxer has guns on her mind. There's buzz of a last-ditch shipment of drugs and weapons crossing the Mexican border ahead of new restrictive gun laws. Before Lindsay can act, her top informant tips her to a case that hits disturbingly close to home. Former cops. Professional hits. All with the same warning scrawled on their bodies- You talk, you die. Now it's Lindsay's turn to choose.