As the community begins to heal after Monday's shooting, new details are emerging that paint a picture of the damage left behind inside Building 197. As investigators sift through the evidence in the Navy Yard killings, Navy officials say damage inside Building 197 is so extensive, it may take weeks to repair and reopen in, CNN's Pamela Brown reports.
The mother of the gunman apologized to the families of the victims on Wednesday, saying "I don't know why he did what he did and I'll never be able to ask him why. Aaron is now in a place where he can no longer do harm to anyone, and for that I am glad. To the families of the victims, I am so, so very sorry that this has happened. My heart is broken."
Law enforcement sources say nothing points to a specific motive for the rampage, even after the seizure of Aaron Alexis' computer and other possessions, as well as interviews with his social contacts.
And odd details are emerging. For example, a federal enforcement source tells CNN that Alexis made unexplained etchings into the shotgun he used in the attack.
Also, new details have emerged suggesting authorities might have been able to contain the gunman more quickly. A government official tells CNN, when the first radio call came in about a shooting at the Navy Yard, highly-trained, tactical capital police officers were told by a watch commander to stand down.
The Capital police chief has ordered an "independent fact review" of their response in the critical first moments after the shooting was reported.
The medical examiner's office was expecting to complete its autopsy of Aaron Alexis late last night. No information about any toxicology results will be released until next of kin are notified.