Investigators have so far been unable to retrieve data from a computer taken from the home of the gunman, Adam Lanza, a law enforcement officials said Tuesday.

It appears that Lanza had smashed the computer, extensively damaging the hard drive, the official said, adding that the FBI is assisting Connecticut State Police in trying to retrieve date from the computer.

Lanza’s mother was shot four times in the head while she slept in her bed, Connecticut Chief Medical Examiner H. Wayne Carver said Tuesday.

Adam Lanza killed himself with a shot to the front of his head from a handgun, the medical examiner said.

Toxicology tests are under way to determine whether Adam Lanza had taken medicines, Carver said.

While Carver said he was told that Adam Lanza had Asperger’s syndrome, officials are working to determine whether that diagnosis was correct, and whether he may have had other diagnosable problems.

A former director of security for Newtown Public Schools shed new light Monday night on the gunman, Adam Lanza.

Richard Novia said Lanza had Asperger’s syndrome, based on documents as well as conversation with Lanza’s mother, who was killed shortly before the Sandy Hook massacre.

Novia said that as part of his job, which he left in 2008, he would be informed of students who might pose problems to themselves or others.

He also said he received “intake information,” which he said “is common for any students troubled or impaired or with disabilities.” The idea was to keep track of and help students who may need it.

However, Novia said he never thought Lanza was a threat and certainly never thought he was capable of such violence.

 

CNN’s Susan Candiotti reported from Newtown; Holly Yana and Greg Botelho reported from Atlanta. CNN’s Sandra Endo, Josh Levs, Miriam Falco, Wayne Drash, Carol Cratty, Paul Steinhauser and David Williams contributed to this report.

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