During a series of hypnotic sessions, after sufficient depth of hypnosis is attained, it is often possible to train the subject to be completely amnesic for all hypnotic experiences (Wolberg (11), Brenman and Gill (1), Estabrooks (3).)
As a result of such training, the hypnotized person is totally unaware of the fact that he had been subjected to hypnosis.
In all probability, he can also be made to forget any special induction technique- such as injection of a drug--which might have been used originally to produce hypnosis.
Thus, once a deep hypnotic trance is achieved, it might be possible to introduce post-hypnotic amnesia so that a defendant would not know, ...perhaps for an indefinite period thereafter, that he had been subjected to hypnosis, to drugs, or to any other special treatment.
If intensive hypnotic training can achieve a total amnesia, the defendant would remember only what the police agents tell him to remember about the treatment he received at their hands.
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