Missouri governor calls for "vigorous prosecution" of Darren Wilson

“A vigorous prosecution must now be pursued,” Nixon said in a five minute video address posted to his website Tuesday.

“The democratically elected St. Louis county prosecutor and the attorney general of the United States each have a job to do,” said Nixon, a Democrat.

“Their obligation to achieve justice in the shooting death of Michael Brown must be carried out thoroughly, promptly, and correctly,” said Nixon of investigators.