Explain the pictures of emily parker with president at the sandy hook memorial

I would like a complete and thorough explanation of the sandy hook shooting including: an explanation of the facebook sandy hook donation pages up before the shooting; i would like to know the other people involved in the shooting who were detained; i would like to know how the bushmaster "killing machine" was locked in the trunk of adams car while he was dead in the school; we all would like to know why fema and law enforcement keeps running drills and training exercises in the same towns days before these mass killings...i would like this explained from the president please not piers morgan, thanks