A La Pine man who fled to Costa Rica after his 2007 conviction on sex abuse charges was back in Deschutes County on Friday after an extradition effort that involved the FBI, U.S. Marshals Service, Costa Rican immigration officials and Interpol — the world’s largest international police organization.

Ronald Kenneth McMaster, 52, appeared in Deschutes County Circuit Court on charges of violating his probation when he failed to complete court-ordered sex offender treatment and left the country.

McMaster was convicted of three counts of first-degree attempted sex abuse and one count each of attempted sodomy and attempted sexual penetration of a 23-year-old woman when she passed out at his La Pine home after an afternoon of drinking in June 2006.

A judge found that the community would be better served by putting McMaster into sex offender treatment than sending him to prison. He was also sentenced to 10 years’ probation and ordered to have no contact with the victim.

But McMaster disappeared, and local authorities had no idea where he was until Stan Russell, of La Pine, heard from a friend in Costa Rica, saying she’d met McMaster, who was going by the name “McAllister,” Russell said.

Russell called his brother-in-law, Wyn Lohner, who also happens to be the Baker City police chief. Lohner contacted the Deschutes County District Attorney’s Office, which brought in the FBI and U.S. Marshals Service to arrange for McMaster’s return.

Interpol agents in Costa Rica discovered that McMaster traveled regularly to Costa Rica’s capital, San Jose, where he was arrested. At the time of his arrest, a San Jose newspaper reported McMaster was working as a real estate investment agent.

McMaster was being held without bail Friday at the Deschutes County jail. He faces a maximum three-year prison sentence.

He is scheduled to return to court Tuesday for a hearing to determine if he violated his probation.