Adam Lanza's father, Peter: 'We too are asking why'

Peter Lanza, the father of 20-year-old Adam Lanza, who shot to death his mother in their home and then slaughtered 26 people in an elementary school before killing himself, issued the following statement Saturday:

"Our hearts go out to the families and friends who lost loved ones and to all those who were injured.

Our family is grieving along with all those who have been affected by this enormous tragedy. No words can truly express how heartbroken we are.

We are in a state of disbelief and trying to find whatever answers we can. We too are asking why. We have cooperated fully with law enforcement and will continue to do so.

Like so many of you, we are saddened, but struggling to make sense of what has transpired."