He Vanished While Duck Hunting — and Everyone Blamed the Gators. But His Wife Knew Exactly What Happened By Sean Neumann 32

A new true crime docuseries that begins streaming later this month will examine the extraordinary lengths one Florida woman took to uncover the truth behind a murder conspiracy hatched by her husband and his best friend’s wife.

The new series, Mr. and Mrs. Murder, from ABC News Studios and Hulu, will debut on July 30 on the streaming service. PEOPLE has an exclusive first look at a new trailer for the series below.

The four-part docuseries tells the story of the 17-year mystery that followed Mike Williams’ death in 2000. On Dec. 16 of that year, the 31-year-old father packed his boat and went duck hunting on Lake Seminole with plans to return home later that day to celebrate his anniversary with wife Denise Williams. 

But as the hours passed, Mike never returned.

ABC and Hulu’s new docuseries dives deeper into the growing suspicion that Kathy Aldredge, who was then married to Mike’s best friend, had about what really happened to Mike. In the trailer, Kathy recalls that six months after Mike died, Denise gave up the search for answers and had her husband legally declared dead. Local police had believed Mike was eaten by alligators after discovering his boat still on the water.

But what really drew Kathy’s suspicion was the affair Denise soon began having with her husband, Brian Winchester. In the trailer, Kathy alleges that Denise and Brian’s relationship “involved decadent sexual behavior.” 

Soon, Brian divorced Kathy and married Denise, and the couple appeared happy as ever.

“To say they stabbed me in the back doesn’t even touch it,” says Kathy. “They had stabbed me in the soul.”

Kathy adds about her ex-husband: “He was your closest friend. You loved him like a brother. Yet, you marry his wife and move into his home? Who can do that? No one else was at peace, but they were. That meant they knew what happened to him.”

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In the nearly two decades that followed, Kathy and several of Mike’s family members continued to investigate the mystery behind Mike’s disappearance — despite police’s initial belief that he had died by accident, and was perhaps eaten by alligators.

Kathy would later become an official informant for police, go undercover, and also testify on the witness stand against her ex-husband and former best friend. What she discovered — and the secrets she revealed on the witness stand — helped lead to a satisfying conclusion of the case for her and Mike’s family.

“I did feel a lot of satisfaction that they were imploding,” Kathy smiles in the new trailer as she teases the story of her pursuit of justice. “I loved it.”

Watch it all unfold July 30 when the four-part series begins streaming on Hulu.