So if a guy is a single parent widower (no other relatives), and he robs a convenience store, shoots the clerk, get arrested, and put in a mean-ass prison, you don't separate the kids from him ?
You put them in that mean-ass prison (fights, sex abuse, stabbings, drugs, etc) with him ? If not, you're separating them, right ? WHAT DO YOU DO ?
Social Service will provide an emergency Foster Home Placement (FHP) for a dependent child while concurrently seeking a relative willing, able and stable to foster the child.
The child will be supervised in the FHP by a lead Social Worker employed by Social Service and placed in a safe and fully vetted / licensed home, most of which are owned and operated by the private sector, including religious organizations. The vast majority have a capacity of six minors, each child will have a bedroom with only one other child.
The child will be represented by a Court Appointed Special Advocate (CASA) or guardian ad litem and the Court will find the minor to be a dependent ward of the court under (CA law) 300 W&I, et seq. The Court will follow the progress/care of the minor at regular reviews until such time as the minor turn 18, or if returned to the parent(s) or other relative, or if the parental rights are taken from them adopted or raised by Foster Parents.
Of course none of the Mothers and Fathers in the current crisis have robbed a store, shoot a clerk and been arrested. The claim by Trump that all people of color are murderers, rapists and only some are good people is only believed by easily led fools and racists.