Sandy Hook report does not reveal motive

Nov. 25 (UPI) -- Nearly a year after Adam Lanza walked into Sandy Hook Elementary School and opened fire, brutally killing 20 young children and six school staff before turning the gun on himself, investigators have released a report on that tragic day.

The report, released by the Connecticut state attorney Monday, concluded that Lanza acted alone in murdering 27 people in Newtown, Conn., on Dec. 14, 2012, but failed to find his motives.

"There is no evidence to suggest that anyone other than the shooter was aware of or involved in the planning and execution," said Stephen Sedensky III in the report.

Lanza suffered from "significant mental issues" and had "an obsession with mass murderers, in particular the April 1999 shootings at Columbine High School."

The report found Lanza's mental issues "affected his ability to live a normal life" but it was not directly clear why he acted or why he targeted Sandy Hook Elementary.

Sandy Hook Final Report by United Press International