Quicklist:title: Lanza had a falling out with his 'one and only friend' months before.
Here are some of the disturbing things we learned about Lanza. 'This report cannot and does not answer the question of 'why' AL committed murder,' the authors wrote. The report's authors say they 'looked for any warning signs, red flags, or other lessons that could be learned from a review of AL's life,' referring to Lanza.
