A former US serviceman arrested in Honolulu for sending emails from Thailand threatening to kill Vice President Joe Biden has pleaded guilty.
Justin Alan Woodward withdrew his not guilty plea during a hearing in federal court.
Assistant US Attorney Thomas Brady said Woodward faces a maximum sentence of five years in prison and a 250,000 US dollar fine when he is sentenced in January.
Woodward was arrested last year at the Honolulu airport when he arrived on a flight from Bangkok.
According to the criminal complaint, he told agents he wrote the threatening messages, including one sent to the White House website. The IP address was traced to a public Wi-Fi access point in Chiang Mai, Thailand.
He told officials he was discharged from the US Marine Corps for bipolar disorder.