At the very least, there should be other witnesses called to testify at the hearing. According to Ford, there was another individual in the room at the time of the alleged assault. This witness has been identified as Mark Judge. He should be called to testify under oath.
There are other witnesses available. One of Ford’s neighbours, Rebecca White, recounted Ford telling her about the incident in 2017, long before Kavanaugh’s nomination.
There are also significant ethical concerns in holding a hearing. Ford, an alleged victim of sexual abuse, will have to stand in front of 24 US Senators, on live television, and relive a highly traumatic incident, with the alleged abuser sitting at the same table. It puts the alleged victim in a highly uncomfortable situation, and reduce the investigation to little more than an exercise of “he said”, “she said”.