TODAY | April 30, 2014
>> four of the six victims shot bay co-worker at a fedex facility remain in a georgia hospital. one is in critical condition. as nbc's kerry sanders reports, all were working the early morning shift when a gunman opened fire.
>> reporter: 19-year-old geddy kramer committed suicide , according to authorities, inside the same fedex building where he worked as a package handler. police say the teenager went on a rampage, repeatedly shooting at co-workers.
>> he had assault rifle , bullets strapped to his chest like rambo.
>> reporter: police say after the gunman committed suicide , officers and federal agents entered the fedex facility here and found several crude, unexploded devices. molotov cocktails . friends say this is not the geddy kramer they knew.
>> he was a very happy person usually. and he was very funny. and he was just all a good person.
>> reporter: i spoke to a friend who's known kramer all his life and also worked with him at fedex . he doesn't want to reveal his identity. his number one complaint at work was?
>> that they mistreated him and made him work even harder than what everyone expected and he was getting paid in peanuts.
>> reporter: kramer 's father released a statement expressing sympathy for the victims. we make no excuses for his actions and are shocked and devastated by them. the family says there are no adequate words at a time like this. kerry sanders , nbc news, georgia.