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NEWTOWN, CT - DECEMBER 15: In this handout provided by ABC News, shows a 2008 yearbook photo of Adam Lanza, (3R) at an unspecified time and place. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by ABC News via Getty Images)
Authorities investigating the school shooting in Newtown said they're looking into all aspects of the shooter's life.
State police spokesman Lt. J. Paul Vance said on Thursday that investigators are "looking at everything to do with the shooter, his history, medical, psychological, education, family history, everything and anything relative to him we're examining."
Adam Lanza, 20, shot his way into Sandy Hook Elementary School on Dec. 14 and slaughtered 20 first-graders and six educators. Lanza also killed his mother that morning and committed suicide as police arrived.
Vance said investigators are making progress. He could not provide a timeframe for when the investigation might conclude.
He said children would only be interviewed if necessary.
Police have yet to offer a possible motive for Lanza's rampage.