The Connecticut State’s Attorney has released their report on the Sandy Hook shooting [pdf]. The case has been declared closed at this point.
There aren’t any substantial revelations about Lanza’s motives. He was not found to be taking medication, nor was he under the influence of drugs at the time. He does not appear to have told anyone his intentions in advance.
Regarding the search of his home, other weapons were found. All of them were registered to his mother in accordance with state and federal laws. A computer was found in Lanza’s bedroom, but he appears to have damaged it to make the contents unreadable.
(…) investigators found a computer hard drive that appeared to have been intentionally damaged. To date, because of the extensive damage, forensic experts have not yet been able to recover any information from that hard drive.
In a typical criminal case, the investigation would remain open when potentially important evidence was still being examined.
Continued...