Al Gore Al Gore

Former Vice President Al Gore was accused of "unwanted sexual contact" by an unidentified woman in Portland, Ore., in 2006, according to local law-enforcement officials, although no criminal charges were filed.

A lawyer representing the woman contacted Portland police in late 2006, according to the office of Multnomah County District Attorney Michael D. Schrunk. However, the woman refused to be interviewed by authorities and said she did not want to pursue a criminal case against Gore.

The woman declined to participate in a criminal investigation because she planned to pursue a civil case at the time, Portland Detective Cheryl Waddell told The Oregonian. There is no evidence a civil suit has ever been opened, according to the newspaper.

Al and Tipper Gore separate after 40 years of marriage

The district attorney's office did not specify the woman's accusations again Gore. However, she reported to the police in 2009 that she was repeatedly subjected to unwanted sexual touching while in his presence, according to The Oregonian.

Police investigated the case further that year, according to the district attorney's office, but Gore was still not charged. Police said there was insufficient evidence to support the woman's claims, according to the newspaper.

The alleged victim's attorney, Randall Vogt, told The Oregonian that the " file was closed and put to bed and forgotten."

The National Enquirer was the first to report the allegations.

After serving as vice president for eight years, Gore lost his 2000 bid for the presidency to George W. Bush. In recent years, Gore, 62, has won the Nobel Peace Prize for work as an environmental activist, as well as an Oscar for his 2006 documentary on global warming, An Inconvenient Truth.

Calls and e-mails to Gore's rep were not immediately returned. Vogt could not immediately be reached.

Gore and his wife Tipper announced their separation earlier this month.