Transcript for Prince Andrew Denies Allegations That He Had Sex With A 17-Year-Old American Girl
David, thank you. Now, to Switzerland. That high stakes gathering of the world's rich and famous, including prince Andrew this year. Now breaking his silence tonight, for the first time, over that sex scandal. ABC's chief foreign correspondent terry Moran. Reporter: Today, an embattled prince Andrew, under tremendous pressure, finally speaking out publicly about the sex scandal engulfing him. I think I must, for the record, to refer to the events that have taken place in the last few weeks. Reporter: Those events, allegations in U.S. Federal court by Virginia Roberts. She says she was coerced into having sex with the prince three times starting when she was 17. All denied by palace officials. I just wish to reiterate and to reaffirm the statements which have already been made on my behalf by Buckingham palace. My focus is on my work. Reporter: But the public focus now inevitably this he-said/she-said dispute. And her evidence? There's this photo from 2001, in London. Roberts, 17 at the time, with prince Andrew. She says they had sex that night. Flight logs that list Roberts as a passenger on private flights to the three locations where she says her sexual encounters with Andrew happened. And prince Andrew's admitted former friendship with the man Roberts says recruited her for sex with Andrew and others -- billionaire Jeffrey Epstein, a convicted sex offender whose plea bargain to just one year in jail Roberts wants overturned. For Virginia Roberts, this is far from over. In court documents, she's issues a stark challenge to prince Andrew, swear on your oath that you're innocent. David?
This transcript has been automatically generated and may not be 100% accurate.