St. Louis County Prosecutor Robert McCulloch decided to immediately release as much evidence as possible to the general public immediately after the decision not to indict Darren Wilson:
Was this an attempt to be completely transparent? Or cynically, was this an attempt to further step away for taking responsibility for the duties of his office? Rather than make the decision and have it clearly on his office, and largely him, he offloaded it to a grand jury who we will never meet. Additionally, by releasing the information to people that don't typically look at this information, and allowing them to make their own decisions, it increases the amount of noise on the discussion, further diluting his role in all of this. That's the cynical way to look at it.
One piece from the packet of interest, is Darren Wilson's testimony.