Why was the young woman held up in the federal imprisonment center?

A young woman who wanted to leave a cruise ship to return to her boyfriend in California spent Monday night in a federal imprisonment center here, charged with threatening to kill everyone aboard the ship to cut the cruise short. The cruise ship was on a 10-day trip out of Ensenada, Mexico, when crew members found two handwritten notes on April 22 and 2Both notes stated that if the ship docked in a US port, the nearly 2,400 passengers and crew would all die. When the ship was searched, nothing was found. The cruise resumed on April 24.  The woman herself confessed the following day.