No clear motive was spelled out in the 44-page summary of the investigation into last year's massacre at Sandy Hook Elementary School that was released Monday. However, new photographs of the scene -- and shooter Adam Lanza's home -- were released. Here is a sampling:
Adam Lanza's bedroom
Items found on or in close proximity to Lanza's body
Items found in the Lanzas' second floor computer room.
Secret Service Director Julia Pierson, who has faced intense scrutiny over the Sept. 19 White House security breach, has resigned, according to the U.S. Department of Homeland Security. Here's what you should know about the highly secretive agency.