They could, but we need the baby.... unless Ford Shelley got one of her baby brushes or bottles.
So ANS always thought about death, but had no plans for burial or an up-to-date will?
AC there is no court on this earth would accept something snagged from the baby for DNA tests while the child is alive. (hair brush, baby bottle, etc).
A court is going to have order that a DNA test be done and that it is done legally with proper procedures so that there is no arguement of how the DNA was taken from the baby.