Sandy Hook police investigation to be released This gun was found at Sandy Hook Elementary School in Newtown after Adam Lanza gunned down 27 people including himself. SEVERAL thousand pages of police documents from the investigation into last year's school massacre in Newtown will be released on Friday (US time), Connecticut authorities have said. State police said today that their report "has been redacted according to law," and includes text, photos and 911 calls received by state police, they said. Prosecutors issued a summary of the investigation last month that portrayed the gunman, Adam Lanza, as obsessed with mass murders, but the report concludes that Lanza's motives for the massacre might never be known. Carlee Soto uses a phone to get information about her sister, Victoria Soto, a teacher at the Sandy Hook Elementary School in Newtown. Victoria was among those killed. Lanza gunned down 20 first-graders and six educators with a semiautomatic rifle at Sandy Hook Elementary School on Dec. 14, 2012, after killing his mother inside their home. The summary says the 20-year-old Lanza had "significant mental health issues." An undated ID photo of Lanza. In the fifth grade, Lanza wrote "The Big Book of Granny," in which the main character has a gun in her cane and shoots people; another character talks of liking to hurt people, especially children. Lanza became obsessed with the 1999 bloodbath at Columbine High in Colorado and other mass killings, the report said.