UPDATE: Bruce has been released from detention but must stay in Mexico while the investigation continues.

An Emmy-nominated reality show producer is currently being called a person of interest in the death of his wife.

Bruce Beresford-Redman was detained by authorities in Mexico on Thursday after his wife was discovered dead in a sewer. Monica Beresford-Redman had been reported missing by her husband on Tuesday after she supposedly failed to return from a shopping trip.

Monica’s body was found on the grounds of Cancun’s Moon Palace resort, where the two had been staying. A security guard from that hotel reported seeing Bruce attempt to strike his wife as the result of a fight. Others staying in the same hotel also claim they heard the couple arguing in their room.

In an exclusive interview with Radaronline.com, Monica’s sister, Carla Burgos, claims infidelity may have been the reason for her death. “I know he was having an affair,” Burgos claimed. “And she found out.”

Although a cause of death has not yet been determined, authorities say scratches have been found on Bruce’s neck. Officials planned to perform toxicology tests to see if any drugs were in his system.

“He’s the initial focus of the investigation based on their alleged turbulent relationship,” an official stated.

In addition to helping develop Survivor, Bruce was also involved in the production of other shows including The Contender, Crash Course and The Restaurant.