the suspect and giffords' office and an envelope was found at loughner's home which seemed to foreshadow the shooting and reads in part, also recovered in the safe was an envelope, handwriting sight i planned ahead in my assassination and the name gifford along with what appears to be loughner's signature and confirmed that the gun was bought in a gun shop in november. a glock .9 millimeter. he was required to pass a fbi background check which he did without incident and law enforcement and second county sheriff telling fox in the video throughout the day comes from safeway in tucson where the the shooting happened and the man in the lower right corner that have video has been identified, a cabdriver who went to the supermarket for change. earlier federal investigators were trying to work out whether he was part of the shooting or a witness. and tonight, fox is told that this lead has washed out.