Bruce Beresford-Redman reported her missing on Tuesday in the resort city of Cancun, a Mexican official said Thursday.
The body of Monica Beresford-Redman was found Thursday in a sewer at the Moon Palace resort where the family was on vacation, according to the official at the office of the attorney general for Quintana Roo state, where Cancun is located.
A witness at the hotel saw the couple arguing Sunday, and Bruce Beresford-Redman has been detained as a suspect, said the official, who spoke on condition of anonymity because he was not authorized to talk to the media about the case.
The cause of death has not been determined.
Beresford-Redman told police Tuesday that his wife left the hotel the previous day and never returned, the official said.
MORE ON CRIMESIDER