“In May, Burgess pleaded guilty to a felony charge of removing or concealing human skeletal remains.”

I don’t see the case they could raise unless they want to try to codify whether or not the remains are human at 28 weeks.

Killing a baby at 28-weeks of pregnancy and hiding the body is illegal in the vast majority of the US, including in blue states.

What specifically would be unconstitutional about this conviction?

bit too late for that, as she admitted to her guilt