A private autopsy found that Michael Brown was shot at least six times. But so far, there is little verifiable information on what happened in the moments before Officer Wilson opened fire. Senior Medical Correspondent Elizabeth Cohen looks at the clues that forensic scientists will use to piece together Michael Brown's final moments.
How many times did Officer Wilson pull the trigger? Susan Candiotti looks at what investigators can learn from ballistics evidence.
Go behind the scenes of Elizabeth Cohen's visit to South Carolina's Newberry County Memorial Hospital.
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