What happens after 12 months and CPS case is dismissed?

Hi all, we are closing in on the end of our kinship care period and are going to mediation next week. We have been asked to consider permanent managing conservatorship as a resolution to this case, but will decline. I don't think CPS is confident in getting a TPR and the bio mom is unwilling to relinquish voluntarily. The plan is concurrent and would be RU except bio mom has felony endangerment charges that haven't been tried. Since her fate is in question, what to do about the case itself is problematical for the department. My question is, what does it mean to everyone and the law if a CPS case is dismissed? Is it like it never happened and isn't a factor if her children are removed again? Do they go back to her but still receive some form of services/monitoring or is CPS out of the picture? Any info would be greatly appreciated.