In 1993, "Miami Herald" reporter Juan Tamayo received a tip that a former member of Argentina's People's Revolutionary Army (ERP), who had defected and was living in Europe, had recognized news photographs of the suspected bomber as being of an ERP militant whom he had known by the codename "Martín el inglés" ("Martin the Englishman"). Freelance journalist Doug Vaughn, who was working for the Christic Institute, then established that the stolen Danish passport issued to Per Anker Hansen had been used to apply for a Panamanian visa, and he obtained the corresponding file from the Panamanian government, including a photograph and a right thumbprint. Argentine journalists then obtained Gaguine's fingerprints from the police, and Vaughn and Tamayo took the two sets of prints to a fingerprint expert in Miami, who found a perfect match. Vaughn showed newsphotos of Gaguine to the alleged bomber's brother and father, who confirmed the identification. According to Argentine journalists cited by Tamayo, Gaguine was among a group of guerrillas who were killed in the 1989 attack on La Tablada barracks.