Wiles, an avid hunter and fisherman and a licensed pilot, didn't appear to have enemies, Couvertier said. That's why the FBI is asking anyone to come forward if they have heard anyone say anything negative about Wiles, his family or his family business.
"We want the people who have him to understand they made a mistake," Thomas Wiles said. "We want him back, and we're not going to hold a grudge."
Wiles, the oldest of three children, worked for the family-owned National Flight Services as a business development manager, meaning he was charged with bringing in new clients. Registered out of Ohio, where Thomas and Pamela Wiles live, the company does maintenance and repair work at airports in Florida, San Antonio, Toronto and Toledo, Ohio.
The company Web site hosts an online missing poster of Robert Wiles, with phone numbers and a company e-mail for anyone who has information.
The Wileses said they do not fear for their own safety or that of their daughters, ages 18 and 25, as the FBI assured them they are not in danger.
"Robert is a good citizen," Thomas Wiles said. "He's the kind of guy we want more of in this country."
Anyone with information about the case is asked to contact the FBI's Tampa office.