An accusation against Supreme Court nominee Brett Kavanaugh from an anonymous person from Oceanside is part of a timeline of information and interviews received by the Senate Judiciary Committee regarding allegations of sexual misconduct against the nominee.

The timeline was released by committee chairman Chuck Grassley a day before Kavanaugh and one of his accusers, Dr. Christine Blasey Ford, was set to testify in front of the Senate Judiciary Committee over Ford’s allegation that Kavanaugh attempted to rape her in when they were both in their teens.

According to Grassley’s timeline, Senator Kamala Harris gave to the Senate Judiciary Committee an anonymous letter postmarked Sept. 19 that said "Kavanaugh and others raped the author in the backseat of the car."

The letter was signed "Jane Doe, Oceanside, CA" and did not identify a place, date or who the others were, according to the timeline released by Sen. Grassley.

NBC 7 has not been able to verify the timeline described by Sen. Grassley or the alleged accusation. NBC 7 has reached out to Senator Kamala Harris’ office regarding the allegations and has not received a response.

A legal expert told NBC 7 anonymous allegations like this will not be taken seriously by the committee.

"Especially not when you have the kind of people who are going on the record with these other very serious allegations. An anonymous allegation is not going to be factored into the mix," attorney and legal expert Dan Eaton said.

Eaton also said that he expects allegations against Kavanaugh, credible or not, to continue long after the confirmation process.

Kavanaugh appeared in front of the Senate Judiciary Committee on Thursday to answer questions from a panel of 11 Republicans, all men, and 10 Democrats.

In his prepared testimony, the 53-year-old appellate judge acknowledges drinking in high school with his friends, but says he's never done anything "remotely resembling" what Ford describes.

His testimony was preceded by Ford's, who told the committee she said she was appearing only because she felt it was her "civic duty."

Two other women have brought allegations of misconduct against the nominee.

Deborah Ramirez, told The New Yorker that Kavanaugh exposed himself to her while they were both students at Yale. She has acknowledged consuming alcohol at the time, which clouded some of her memories.

The day before the Senate Judiciary Committee was set to begin, Julie Swetnick, has accused Kavanaugh and his friend, Mark Judge, of excessive drinking and inappropriate treatment of women, among other things. The Associated Press hasn't been able to corroborate the claims.

Kavanaugh and Judge have denied the allegations. Kavanaugh said he doesn't know Swetnick and "this never happened."

The Associated Press contributed to this report.