Report: Details of Feinstein letter revealed?

A source who said they were briefed on the contents of the letter said it described an incident involving Kavanaugh and a woman that took place when both were 17 years old and at a party. According to the source, Kavanaugh and a male friend had locked her in a room against her will, making her feel threatened, but she was able to get out of the room. The Guardian has not verified the apparent claims in the letter. It is not yet clear who wrote it.