The criminal trial of a prominent rare books dealer accused of conspiring to possess dozens of pages of handwritten lyrics stolen from the Eagles co-founder Don Henley collapsed abruptly on Wednesday as a judge in Manhattan dismissed the charges in the case.

Citing the “jarringly late” disclosure of 6,000 pages of material by Mr. Henley’s legal team, Justice Curtis Farber of State Supreme Court granted a dismissal request by the Manhattan district attorney’s office.

He added that a review of the material showed that Mr. Henley, his agent and two of his lawyers had acted “to obfuscate and hide information that they believed would be damaging to their position that the lyric sheets were stolen.”

The judge also criticized the district attorney’s office, saying that prosecutors had been manipulated by Mr. Henley’s legal team and had not attained a complete understanding of the case. But, he added, they had ultimately acted in the interest of justice.

“While eating a slice of humble pie,” Justice Farber said, the prosecutors were also “displaying the highest level of integrity in moving to dismiss the charges.”

Still, the dismissal, two weeks into a trial that had already included days of testimony by Mr. Henley, was a severe blow to the district attorney’s office, which began investigating the case several years ago.