The police find such a car owned by such a driver. Impact marks confirm their suspicions and the young man is arrested. The evidence is not testimony given under hypnosis, it is the hard facts obtained as a result of that testimony. But the regressed testimony of UFO witnesses cannot currently be confirmed by hard facts. While I have in my files dozens of cases of witnessed visitations and abductions, there are absolutely none where evidence of what took place while the witness was with the visitors can be supported in any way except by that person's own testimony or the testimony of witnesses.
Hard facts remain impossible to obtain.
Still, the sheer weight of the existing conscious unhypnotized testimony strongly suggest that something real is happening. But there remains an enormous, overwhelming difficulty with trying to use hypnotized testimony as evidence of real events, even when that testimony agrees in particulars among a group of unconnected witnesses. I think it has a very useful place as a therapeutic tool, as it is uniquely capable of enabling the subject to break fear-amnesia. If anyone is to counsel people in situations as sensitive as that of a close-encounter witness, it seems essential that the counselors involved be trained, subject to confidentiality requirements and governed by a peer review process. I have come to believe that many techniques used by amateur investigators are not just suspect, but disastrous.