Apart from the obvious hypocrisy you point out - aren’t they going to need some bodies of those poor babies as proof?
It's possible to get a homocide conviction without a body. Just ask former Delaware Deputy Attorney General Thomas Capano.
The prosecutors will have direct eye witness testimony from the mothers.
They have eyewitness testimony from the other girls, plus they will have medical testimony about previous pregnancies, adhesions, and other conditions caused by repeated “miscarriages” (in this case baby murders.)
This young woman, Michelle—the one who had the five babies beaten out of her—is currently undergoing facial reconstuction surgeries because of what the monster did to her.
She needs our prayers and support.
As an aside—many perps have been convicted of first degree murder without a body as evidence.