"When these cases come up and we start looking at them and we realize something went wrong here, we all need to just admit it, accept it and do what needs to be done to get them out of there in a timely manner," O'Sullivan said.

O'Sullivan suggested better cooperation between defense, prosecution and judges in cases of innocence, which might save taxpayer money.

As a former public defender, she also suggested those savings be used to help relieve the burden on the state's public defender system.

ABC 17 News has reported in the past that the state's public defender system is arguing it has too few resources. That means the caseload is too big and cases may suffer.

And the Missouri Association of Prosecuting Attorneys says it is always reviewing best practices. In response to this story, president Matt Shelby issued the following statement:

"The conviction of an innocent person is every prosecutor's worst nightmare... The rules of the Missouri Supreme Court give prosecutors more ethical duties than any other attorneys."

He also pointed out, despite how the exoneration registry looks, wrongful convictions happen in one out of 25,000 convictions or at a rate of 0.004 percent of the time.