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READ: Sandy Hook Investigation Report Released

School-shooting-survivors
AP Photo / Shannon Hicks

The report concluded that Adam Lanza, 20, acted alone when he fatally shot his mother and then later fatally shot 20 first graders and six adults at Sandy Hook. 

“The purpose of the investigation was to determine what crimes had been committed and whether anyone will be prosecuted as a result of those crimes," Sedensky said in a statement. "Based on a painstaking investigation it is determined that there will be no arrests or prosecutions. The Connecticut State Police are to be commended for their tireless work on this investigation and their consideration of the families and victims involved."

Read the full report:

Sandy Hook Final Report

(Photo credit: AP Photo/Newtown Bee, Shannon Hicks)