The mother of Michael Brown said Wednesday morning she does not believe any of Ferguson, Mo., police officer Darren Wilson’s account of the moments that lead up to her son’s death.

“I don’t believe a word of it,” Lesley McSpadden said on “CBS This Morning.” “[Brown] would never provoke anyone to do anything to him, and he wouldn’t do anything to anybody."

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A grand jury on Monday decided not to charge Wilson in connection with the unarmed teenager's death, resulting in riots in Ferguson and protests nationwide.

On Tuesday, Wilson gave an interview to ABC News where he said Brown had instigated an altercation, after Wilson asked him and a friend to move onto the sidewalk.

"The reason I have a clean conscience is because I know I did my job right," Wilson said, adding that there is nothing he would have done differently that day.

“His conscience is clear? How could your conscience be clear after killing somebody, even if it was an accidental death?” asked McSpadden.

McSpadden and Michael Brown Sr. appeared on CBS with their attorney, Benjamin Crump, who also questioned Wilson’s version of events.

“It seems like his story gets embellished every time he tells it,” Crump said.

He also blasted prosecutors for not cross-examining Wilson during his grand jury testimony.

Prosecutors in the case have taken heat for not advocating for an indictment.

In most cases, prosecutors seek an indictment against a suspect and present the foundation of their case against that individual. In the Brown case, prosecutor Robert McCulloch presented all available evidence and testimony to the grand jury without advocating for charges.

McCulloch’s critics say he did so in order to avoid having to take a side on the controversial case, and that his stated neutrality constituted de facto support for Wilson.

Prosecutors have also said that Wilson believed Brown was a suspect in a convenience store robbery that took place shortly before he was shot. Though video shows someone who looks like Brown stealing cigarillos, his death meant he was never arrested or charged for that crime.

“If something happened in that store — and that’s a big if — that could have been dealt with,” McSpadden said.

“But [Wilson] didn’t have to do what [he] did. He didn’t do what he had to do; he did what he wanted to do.”