An anonymous tip to the FBI led to the arrest of disgraced Democratic fundraiser Norman Hsu in Colorado, according to recently unsealed court documents.

Hsu, a Hong Kong native who appeared suddenly in the New York political scene about four years ago spreading hundreds of thousands of dollars in campaign contributions to Democratic candidates across the country, had been scheduled to appear in court last week to turn over his passport and discuss reducing the $2 million bail he posted related to a 15-year-old arrest warrant connected to his 1992 felony theft conviction. Instead, he skipped town and a judge issued a new arrest warrant for him.

According to court documents, a tipster on Sept. 6 told the FBI in San Francisco that Hsu was in the emergency room at St. Mary's Hospital in Grand Junction, Colo.

Hsu is under guard at the hospital. He was arrested at the hospital after he was taken from an eastbound Amtrak train for treatment of an undisclosed ailment.

Hsu raised hundreds of thousands of dollars for Democratic candidates and groups until his theft conviction came to light. Many of those candidates, including Sen. Hillary Rodham Clinton, have announced plans to return or donate to charity Hsu's election contributions.

Hsu had spent 15 years on the lam from the 1991 theft conviction until he surrendered to authorities Aug. 31.

Prosecutors say Hsu bilked investors out of $1 million by telling them he had a contract to buy and sell latex gloves, but he never purchased the gloves and had no contract to sell them.

He pleaded no contest in 1991 to a felony count of grand theft and was facing up to three years in prison, but he skipped town before his 1992 sentencing date. Investigators believed he'd fled to Hong Kong.

Hsu has said he believed he had resolved his legal issues, but that he would halt his work raising political money.