NCIS: Hawaii Episode 1.20 Nightwatch

When a Naval officer moonlighting as a ride share driver picks up a man and a women. Later the car crashes and the male passenger is dead shot in the head. The team investigates and learns the victim is a prosecutor from the mainland. They discover he was going to see an FBI agent based in Hawaii . So Tennant asks Lucy to talk to Whistler who goes to see the agent and finds the officer there and the agent dead and the woman passenger tries to kill Whistler and escapes. They learn from the officer that the woman shot the prosecutor and made him take her to kill the agent and another person. They learn is a lawyer. They learn the prosecutor, the lawyer and the agent were working on a case involving a corporation who does business with drug cartels.