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NFL's Roger Goodell to hold a press conference, the first in 9 days. We'll have the latest.
Killeen, Texas (CNN) - With the community reeling from a shooting rampage at Fort Hood, investigators are grappling for answers on why Spc. Ivan Lopez opened fire against fellow soldiers.
Investigators are looking at a possible altercation with a soldier "that immediately preceded the shooting," said Lt. Gen. Mark Milley, the post's commanding general.