ORANJESTAD, Aruba – A U.S. tourist who told authorities his friend disappeared while the two snorkeled in Aruba has been detained because police doubt aspects of his story, including whether the pair even went into the water together, a prosecutor said Wednesday.

Gary V. Giordano’s account of the disappearance of his travel partner, 35-year-old Robyn Gardner, had enough inconsistencies that authorities decided they couldn’t let him leave the island, Aruban Solicitor General Taco Stein said.

Giordano, 50, called police in Aruba about 6:30 p.m. on Aug. 2 to say that he and Gardner got separated while snorkeling and she never made it back to shore.