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Posted on September 17, 2013 at 3:51 PM
Updated Tuesday, Sep 17 at 6:25 PM
The former Navy reservist who killed 12 people at the Washington Navy Yard had been hearing voices and was undergoing treatment in the weeks before the shooting rampage, but was not stripped of his security clearance, officials said Tuesday.
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Credit: Katrina Gutierrez / WFAA