According to the state attorney general’s office, based on information from Mr. Hsu’s lawyer, Mr. Hsu arrived at the Oakland airport at 5:30 a.m. on a charter jet. From that point on, no one had any information on his whereabouts — or any they would reveal. Adding to the intrigue is that he may be on the run with his passport: Mr. Brosnahan said that he had sent an assistant to Mr. Hsu’s Manhattan condominium this week to retrieve it, but a 90-minute search proved fruitless.

“Next, we have to find Mr. Hsu,” Mr. Brosnahan told reporters outside the courtroom yesterday.

Should Mr. Hsu turn up, he will be in deeper legal trouble than before. Judge Robert D. Foiles of San Mateo County Superior Court ordered Mr. Hsu’s bail revoked, issued a new warrant for his arrest and said that if Mr. Hsu was arrested again, he would go directly to jail.

His disappearance added to an already embarrassing episode for Democrats, and especially the presidential campaign of Senator Hillary Rodham Clinton of New York, which had enlisted Mr. Hsu as a “Hillraiser” — a major bundler of donations from others. But last week came the revelation that Mr. Hsu was a fugitive, having skipped out on a California sentencing hearing related to a business fraud case and moved back to Hong Kong.

Yesterday, the Clinton campaign called for Mr. Hsu to turn himself in.

“We believe that Mr. Hsu, like any individual who has obligations before the court, should be meeting them, and he should do so now,” the Clinton campaign said in a statement.