In his closing argument, defense attorney Jeffrey Denner described his client as "an odd guy" but not a killer.

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"I am gratified to learn that the U.S. attorney's office is closing its investigation, " Armstrong said.

CNN: January 19, 2013 -- Updated 0035 GMT (0835 HKT)

Indeed, the closing argument is the only time an attorney is sanctioned to opine on the quality of the evidence and credibility of the witnesses.

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