Hello and thank you for your question.
As I believe I mentioned before, if the OSBI finds any misconduct or that the expert's testimony was not scientifically valid, then as a state agency it would be required to reveal its findings. If this is an isolated incident, they would likely do so by notifying the Attorney General's office, and likely the court, the prosecutor and defendant, and the person who filed any complaint
or request for investigation.
The ongoing investigation should not hold up the consideration of the APCR, unless the defendant wants to wait for the results of the investigation. There is no guarantee that the results of the OSBI investigation would find any impropriety. It is an internal investigation of one of its own, and I have no way of telling how thorough or unbiased the review will be, or how long it will take. The defendant could, however, use the fact of the investigation in his favor. One approach may be to request, in the alternative, that if the judge is inclined to deny the APCR that he either delay the ruling, or specifically leave open the possibility of re-argument or further hearing if the results of the OSBI investigation supports the defendant's arguments.
Please feel free to ask any follow-up questions.