Nightly News   |  March 27, 2013

New documents reveal Loughner’s erratic behavior

Authorities in Arizona have released 2,700 pages of documents related to the investigation into the shooting of former congresswoman Gabby Giffords. Six people died and 12 others were wounded in the incident. Interviews with Loughner's parents and friends portrayed an increasingly disturbed young man. NBC’s Miguel Almaguer reports.

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