Is it a conflict of interest the witness in a case has a parent working @ the sheriffs department who worked with the detective?

The question

The witness has a parent that has over 20 yrs of service working as a corrections officer with the detective that referred the charges be prosecuted against the defendant. The detective worked with the witnesses parent as a corrections officer prior to joining the force, ultimately that detective took on the case that over seen the evidence that led to prosecution of the charges.