Shawn and Gus head to the hangar where they learn that Clayton made an unscheduled four-hour stop in Bakersfield the day he died. They track his movements to an environmental non-profit called The Great Green Hope, where the director, Mrs. Thomas, tells them their company had been at odds with Clayton since she and her husband founded it, and that Clayton had come looking for an endorsement on a business move. Mrs. Thomas refused, the argument became heated and Clayton left. Shawn and Gus tell the cops about their new suspect, who it turns out has a pilot's license and could have tampered with the plane's altimeter. Also, the Great Green Hope is the sole beneficiary in Clayton's most recent will. Alice is relieved that the suspect is no longer a member of her family, until Mrs. Thomas arrives for the will reading and she turns out to be Clayton's daughter, Nyna.
Nyna tells Shawn she lost contact with the family years ago when she denounced their way of life and started a new one with her husband Charles. Her dad had come to make amends but she told him she didn't want his dirty money. She doesn't know who killed her father, but she did overhear Clayton on the phone with a golf buddy talking about a problem with his investments. Shawn and Gus go back to the club and talk to Wiswall, who tells them Clayton's hedge fund was just a Ponzi scheme. All of the money is gone. Wiswall is not sure who else knows the truth about the money, but he did keep all Clayton's falsified documents as proof for the SEC. Later, Lassiter and Juliet meet Shawn and Gus at Wiswall's hotel room to get the documents, but when they get there, they find Wiswall murdered and the documents gone. And Shawn now realizes who took them.
At Clayton's funeral, Shawn announces that the culprit is Charles, Nyna's husband. Shawn tells the crowd that after Nyna turned down Clayton's money, Charles asked him to keep the organization in his will. But Clayton refused and was going to change the will back as soon as he got home. Charles, who along with his wife has extensive knowledge of aircraft, tampered with the plane. He thought he was in the clear when Clayton died before he could change his will, but then he learned about the Ponzi scheme. Knowing that Wiswall was about to blow the whistle and freeze Clayton's assets, Charles killed him, too. The police arrest Charles, fulfilling Clayton's dying wish to Shawn.