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(CNN) – Protesters in Ferguson, Missouri, have been demanding the immediate arrest of the officer who shot and killed unarmed black teenager Michael Brown.
But the reality is, it could be months before any decision is made on whether to prosecute Officer Darren Wilson.
St. Louis County prosecutor Bob McCulloch confirmed that a grand jury began hearing evidence Wednesday in the shooting. But he said may take until mid-October to lay out the entire case, including
The evidence includes not only forensics and toxicology reports, but the varying accounts from witnesses who were on the scene that day.
While a lot of the witness accounts CNN has heard have been similar, there have been varying discrepancies, including some reports that Brown was running away when he was shot, which an autopsy released by the family refutes.
Given these discrepancies, will it make witness testimony less credible in the eyes of the grand jury?
Georgetown University law professor and former federal prosecutor Paul Butler discusses.