(A) If an eligible offender submits an application for DNA testing under section 2953.73 of the Revised Code, the court shall require the prosecuting attorney to use reasonable diligence to determine whether biological material was collected from the crime scene or victim of the offense for which the offender is an eligible offender and is requesting the DNA testing against which a sample from the offender can be compared and whether the parent sample of that biological material still exists at that point in time. In using reasonable diligence to make those determinations, the prosecuting attorney shall rely upon all relevant sources, including, but not limited to, all of the following:

1. (1) All prosecuting authorities in the case in which the offender was convicted of the offense for which the offender is an eligible offender and is requesting the DNA testing and in the appeals of, and postconviction proceedings related to, that case;
2. (2) All law enforcement authorities involved in the investigation of the offense for which the offender is an eligible offender and is requesting the DNA testing;
3. (3) All custodial agencies involved at any time with the biological material in question;
4. (4) The custodian of all custodial agencies described in division (A)(3) of this section;
5. (5) All crime laboratories involved at any time with the biological material in question;
6. (6) All other reasonable sources.