I'm not up on all the details of this story....are there children remaining in the home?
I think the two surviving children -- the ones actually fathered by Frederiksen (the "fiancé") -- were removed to foster care, and that Miller and Frederiksen are in the process of trying to get them back.
Thankfully the authorities in Iowa finally acted on the reports on these parents and have taken custody of two very young boys (younger than the murdered 5 yr old)
As others have noted, Ms. Miller had two younger children, allegedly with Mr. Fredricksen. They have been in foster care since shortly after the murder.
This suicide attempt will at least make it likely that they will regain custody.