Police said investigators did not collect the clothes she offered at that time because "they did not feel there was any evidentiary value" to them, and the case was "not investigated further because detectives concluded there was insufficient evidence to support the allegations."
There was no indication in the report the police ever interviewed Gore about the allegations.
The district attorney's office said it only learned on June 23 of the follow-up 2009 investigation when it received the 73-page report released to the media.
"If the complainant and the Portland Police Bureau wish to pursue the possibility of a criminal prosecution, additional investigation by the Bureau will be necessary and will be discussed with the Portland Police Bureau," said the district attorney's office.
The allegations were first reported by the National Enquirer, which frequently pays news subjects for their first-hand stories.
The Portland Tribune said it had investigated the allegations in 2007 after receiving the police report through a public records request but chose not to publish a story because it said attorneys for the former vice president categorically denied the charges.