Motive remains mystery in Newtown shootings

Newly released search warrants in the Newtown school shooting have revealed that gunman Adam Lanza?s home was packed with weapons and ammunition, but the documents do not shed any new light on what could have driven him to massacre 20 children and six educators inside an elementary school.

Lanza left behind journals, which state police turned over to the FBI for analysis, but if investigators have any ideas about his motive, they aren?t saying.

?Why is it the big unanswered question,? said Nicole Hockley, whose son Dylan was among the children killed at Sandy Hook Elementary School.

?So I have to come to grips with the fact that I might never know why he did what he did. But knowing how he did it and what we could do to prevent someone else doing that, those are valuable lessons that we can learn,? she said.

Warrants released Thursday provide the most insight to date on the world of the 20-year-old gunman, a recluse who played violent video games in the Newtown home where he lived with his mother.

On the morning of Dec. 14, he took four guns but left behind firearms, knives and more than 1,600 rounds of ammunition at his spacious, colonial-style home.