Ryan Sean Davy handed himself in to authorities in Kathmandu on Tuesday after being caught last week hiding in a cave near Everest’s base camp without a permit.
The 43-year-old threatened officials from the tourism department during questioning and was arrested under Nepal’s public order laws, said Tourist Police Inspector Tulasha Khatiwada.
He is now in custody and will appear in court next week to face charges related to his Everest attempt and possible additional offences over his conduct during the investigation.
“He will be fined and deported as per the Tourism Act of Nepal. He may face further penalty for misbehaving with the police,” said the director of the tourism department, Dinesh Bhattarai.
Foreigners have to pay the Nepal government $11,000 for permission to climb the 8,848m peak – a major earner for the impoverished country.
Climbers caught without the mandatory permit are fined $22,000.
Davy could also be blacklisted from the Himalayan nation for five years, or face a 10-year climbing ban when he appears in court.