New DNA evidence at Knox murder trial fails to prove that kitchen knife was murder weapon

  • by: COLLEEN BARRY , Associated Press
  • Updated: November 6, 2013 - 2:25 PM

FLORENCE, Italy — U.S. student Amanda Knox's defense got a boost on Wednesday when a new DNA test on a kitchen knife failed to conclusively prove that it was the murder weapon used to kill her British roommate.

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