My question involves criminal law for the state of: California
In the 1980's and 1990's the Santa Barbara County DA's office used an expert witness that testified in several sex offense cases, in 1997 he was later found to have used junk science, and discredited.
In a front page article of the local news paper, the DA claimed that his office investigated all cases in which the discredited expert witness testified, this was said to appease the public, there was never any investigation or revierw completed. And if there were, should'nt there have been records?
Does this constitute a "mistrial" since bogus testimony was presented and convictions were made due to this expert witness?
What would be any recourse if any besides paying an attorney thousands of dollars?
Thank you for any help in this matter.

