Angela Wright was willing and able to testify for Anita Hill at the Clarence Thomas hearing.

She would have confirmed that she had also suffered from sexual harassment by Clarence Thomas. But the Senate Judiciary Committee, headed by Joe Biden, failed to call her.

This was from an interview in 2007.

https://www.npr.org/templates/story/story.php?storyId=15113601

First of all, I would like to ask, why didn't you testify? You were subpoenaed to come to Washington. You were interviewed. Your interview was placed in the record, but you were never called. Now, [former] Republican [Senator] Alan Simpson, at the time, said you got cold feet. Did you get cold feet?

No, absolutely not, Michel. I was fully prepared to testify. I realized it was not going to be easy, but I was – once I was there, I was committed to going through with the process. The only reason I didn't testify is because I wasn't called to testify. I was there for three days, waiting with my attorneys for the Judiciary Committee to call me, and it was their decision...