There was no dna as evidence—the body had decomposed so thoroughly that all extraneous dna (as from her killer or killers) had degenerated to the point of being useless. Think about it. The body lay there for months in the swamp (it even flooded for a time), and I believe this was on purpose and for the exact reason we’re discussing. So little or nothing could be proven. The dna was no longer viable proof. There was only the blanket (proven to have come from the household), the laundry bag (also from the household) and the poor child’s clothing.
I’m gonna scream. They don’t need no friggin’ DNA evidence. Of course if it was a fresh scene, things would have the mom’s DNA. DNA would have been for exclusionary purposes.