#LISK #LongIslandSerialkiller, subscribe @HiddenTrueCrime Live 6:30 pacific on Saturday with psychologist Dr John Matthias. Bonus episodes and your support for our Channel: https://www.patreon.com/hiddentruecrime Article we read on our channel: https://www.cbsnews.com/newyork/news/watch-live-gilgo-beach-victims-attorney-expected-to-reveal-new-details-in-rex-heuermann-investigation/ John Matthias is a licensed clinical and forensic psychologist with 30 years' experience in both clinical and forensic work. He serves as an expert witness for the federal government and has consulted on numerous high-profile cases for District Attorney's offices and defense attorneys in several states. He has appeared in documentaries and long form newscasts, and hosts the popular Hidden True Crime Podcast with his journalist wife Lauren Matthias. In the forensic area, Dr. Matthias has developed expertise in personality assessments, hidden behavioral motivations, complex trauma and criminal psychology. In the clinical realm, he has worked with numerous victims. He received his Master's degree in Marriage, Family and Child counseling, as well his doctorate degree, from the University of Southern California. Dr. Matthias graduated with honors in philosophy from Princeton University, and he won the prestigious McCosh Thesis prize while there. In high school he graduated valedictorian from a large public high school in Chicago where he was chosen to participate in a ground-breaking valedictory study that continues to this day.