Given a chance to review the long-awaited investigative report on last December’s Newtown Elementary school shooting, Connecticut lawyers said they were confronted with shocking details of Adam Lanza’s final days.

The report for the first time described Lanza’s bedroom in the home he shared with his mother on Yogananda Street. The windows were covered with black trash bags. In the home, investigators found information Lanza had collected about gun violence, including spreadsheets he created to document mass shootings.