Rio de Janeiro investigators suspect that Greece’s ambassador to Brazil was murdered at the behest of his wife and a police officer with whom she was romantically involved, Globo TV reported on Friday, citing police sources.

Greek Ambassador Kyriakos Amiridis, 59, had been missing since Monday night. His Brazilian wife, Francoise, reported him missing to police on Wednesday. The pair have a 10-year-old daughter. Investigators told Globo TV they believe Amiridis’ wife and the police officer, Sergio Moreira, arranged and possibly carried out the murder in a home where the diplomat and his wife were staying in a northern Rio suburb.