Why Adam Lanza went on his murderous shooting rampage at a Newtown, Connecticut elementary school nearly a year ago may never be known.
That was the conclusion of prosecutors Monday, as revealed in a report that closed out their exhaustive investigation into the Sandy Hook tragedy.
Adam Lanza, 20, killed 20 Sandy Hook Elementary School first-graders, six educators, his mother and himself to death on December 14 of last year.
According to the summary report by the lead investigator, State's Attorney Stephen Sedensky III, there was no indication Lanza would've done this.
Lanza was obsessed with mass murders and the 1999 Columbine High School shooting in particular, but never discussed replicating such massacres.