New York ? A federal judge declared a mistrial Friday in the obstruction-of-justice trial of Frank Quattrone, one of the nation’s leading technology bankers during the Internet stock craze.

The decision by U.S. District Judge Richard Owen came after jurors reported they were deadlocked on all three charges against the former financial star — two counts of obstruction and one count of witness tampering.

Frank Quattrone, left, leaves federal court in New York with his attorney John Keker. U.S. District Judge Richard Owen declared a mistrial Friday after the jury in Quattrone's trial was unable to reach a decision after six days of deliberation. Quattrone was accused of witness tampering and obstruction of justice.

Friday was the sixth day of jury deliberations.

Quattrone, 48, showed no reaction as the mistrial was declared, and later declined to comment.

His lawyer John Keker said: “We are disappointed because Frank Quattrone is a man of integrity and a man who followed the rules.”

The mistrial sets the stage for a possible second trial of Quattrone later.

Federal prosecutors, who earlier had indicated a retrial was likely in the event of a mistrial, said outside court that no decision had been made.

The case centered on an e-mail written by a subordinate and forwarded by Quattrone to his staff on Dec. 5, 2000, that encouraged employees to “catch up on file cleanup” by destroying some documents.

Quattrone added a brief endorsement to the e-mail that concluded: “I strongly advise you to follow these procedures.”

Federal prosecutors contended Quattrone was aware at the time that regulators and a federal grand jury were conducting an extensive investigation of his bank, Credit Suisse First Boston, and that he was deliberately trying to block it.