Visual snow syndrome is a rare neurological condition in which a person sees "static" in their vision. You could compare it to looking at a tv screen that has no picture, just a black and white snow-like image. Only about  2% of the population has the illness. Is accused murderer Bryan Kohberger among them? Kohberger reportedly wrote about the condition in a series of posts during his teenage years. Doctors say depresssion, anxiety and poor sleep are common side effects. Nancy Grace talks with Dr. Chloe Carmichael, a clinical psychologist, and author of  ‘Nervous Energy: Harness The Power of Your Anxiety”  about the disorder.