SAN DIEGO (CBS 8) - New details have come out about the shooter who carried out Friday's attack at an elementary school in Newtown, Connecticut.
Adam Lanza, 20, has been described as quiet and someone who had behavioral issues.
News 8 spoke with a local psychiatrist on what might have led Lanza to commit such a horrific crime.
San Diego-based Psychiatrist and Author, Dr. Stephen Sobel says Friday's massacre is hard to comprehend even within his professional circle.
According to Dr. Sobel, it's likely the shooter was psychotic, a rare disorder that usually starts in the late teens or early twenties.
Lanza's family admits he did have behavioral issues and was home-schooled.
Dr. Sobel theorizes Lanza probably showed even more changes leading up to Friday, like increased aggressiveness and anxiety.
But why would he murder his mother and then force his way into Sandy Hook Elementary School to carry out the malicious attacks?
Reports indicate Lanza's mom may have taught at the school and that he had an altercation with the staff one day prior to the shootings.
Dr. Sobel says Friday's shooting should draw attention to mental health issues and where people can go for help.
The California Association of Marriage and Family Therapists has a website where people can find free resources.
San Diego County mental health experts are available 24 hours a day by phone.