David Spiegel is a renowned psychiatrist who recently testified in the infamous Johnny Depp-Amber Heard trial where he talks about his hypnosis theory.

Johnny Depp and Amber Heard's defamation trial enters into its 20th day and today the testimony that grabbed everybody's attention was from David Spiegel. The psychiatrist makes various claims using his experience in the field of hypnosis and psychotherapy. 

Let's get into the details of what he had to say and who he actually is.

Dr. David Spiegel? Psychiatrist On Johnny Depp Trial

David Spiegel, MD, is the Jack, Lulu, and Sam Willson Professor of Medicine and Associate Chairman of Psychiatry and Behavioral Sciences at Stanford University School of Medicine, where he has worked since 1975.

He also serves as the head of the Psychosocial Research Laboratory. Before arriving at Stanford, he acquired his medical and psychiatric studies at Harvard University. He has authored over 280 research papers, scientific journal chapters, and books.

Spiegel is a pioneer in psychosomatic research, therapy, and development, with a special focus on psychoneuroendocrinology and cancer. Since 1976, when she began studying the benefits of support groups for women with metastatic breast cancer,

Further, the psychiatrist has published multiple studies demonstrating that group psychotherapy therapies improve mood disturbance, coping, and pain in these patients.

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David Spiegel's Hypnosis Theory About Johnny Depp Trial Explained

Dr. David Spiegel testified that anyone who abuses alcohol and cocaine to such an extreme level will have unavoidable consequences. He has more than 40 years of hypnosis, psychotherapy, and stress physiology clinical and research expertise.

When asked about the effects of serious substance usage on the brain, Speigel cited examples of Depp's memory and cognitive function is affected. When Depp was filming, he was fed his lines through an earpiece. He further said that throughout Depp's video deposition, his processing speed was slow and that his remarks were unconnected.

According to Spiegel, Depp was unable to recollect any of the terms, which is rare for someone his age. Depp said that drugs and alcohol helped him, but he also recognized that they were the source of his troubles, according to Spiegel. Depp has also stated that he functions better when he is sober, according to the doctor.

Dr. Alan Blaustein, Depp's previous psychiatrist, completed a mental examination, according to Spiegel who testified. last week. The patient is asked to recall three words, then come back five minutes later and repeat them.