(CNN) - Former Vice President Al Gore will not face prosecution on an allegation of sexual assault from 2006.
The allegation, brought forth by Molly Hagerty, claims Gore sexually abused her during a professional massage at the Hotel Lucia in Portland on October 24, 2006.
The Portland Police Bureau did not recommend prosecution "due to a lack of credible evidence," according to the Multnomah County district attorney's office.
"After evaluating the materials submitted by PPB I have concluded that I agree with the assessment that a sustainable criminal case does not exist," Senior Deputy District Attorney Don Rees wrote in a memo Friday. "Ms. Hagerty's detailed statement ... is insufficient to support a criminal charge given other contradictory evidence, conflicting witness statements, credibility issues, lack of forensic evidence and denials by Mr. Gore."
Gore's office in Nashville, Tennessee, released a statement saying the former vice president was pleased with the finding.
"Mr. Gore unequivocally and emphatically denied this accusation when he first learned of its existence three years ago," the statement reads. "He respects and appreciates the thorough and professional work of the Portland authorities and is pleased that this matter has now been resolved."
Read the full memo here.