A member of the grand jury for the Ferguson case sued the county prosecutor Monday, claiming that the public's impression of the grand jury's work was "not entirely accurate," New York Times reported.

The jury did not indict the white police officer who fatally shot unarmed black teenager Michael Brown in Ferguson Missouri last year.

According to the lawsuit, the St. Louis County prosecutor Robert P. McCulloch may have chosen to not present enough evidence to indict Darren Wilson, the officer who fired the shots.

The NAACP legal advocacy group is asking a St. Louis judge to have a second grand jury to investigate the Ferguson case, Los Angeles Times reported. The group also asked to add a special prosecutor to the case.

Court documents show that McCulloch refused to hand the first case over to a special prosecutor after critics said he was too biased to handle it.

"Our review of these proceedings has raised grave legal concerns, including knowing presentation of false witness testimony, erroneous instructions on the law, and preferential treatment of Mr. Wilson by the St. Louis County Prosecuting Attorney's Office," Sherrilyn Ifill, the president of the NAACP Legal Defense and Educational Fund, said in the letter.

A group of about seven residents also filed a bar complaint against McCulloch Monday because he breached ethical rules by presenting incorrect legal standards and questionable testimony, they say.

In the court filing against McCulloch, the plaintiff indicated a desire to "advocate for legislative change to the way grand juries are conducted in Missouri," according to the N.Y. Times.

The member of the grand jury is suing McCulloch for the right to speak publicly about the prosecution's confusing way of handling the case right at the time that the NAACP released its letter.

The American Civil Liberties Union of Missouri is presenting the grand jury member in their case against McCulloch.

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