Every MSM news article that I've read says that the tests were done to DETERMINE THE IDENTITY of the baby.
Maternal (or mitochondrial) DNA matches are not generally accepted by courts as positive identification. Mitochondrial DNA, which is half of the component, is absolutely identical from mother to daughter and is a relatively quick set of lab tests, but because there can be so many females in a family tree with the same mitochondrial DNA, the identification is considered an indication, not a certainty. The father's component is highly variable from father to child, and thus much more complex to test.
CG indicated to police that the baby at his house was suffering from jaundice, which can be the principal visible symptom of RH factor incompatibility of the parents, and most often becomes a risk in the mother's second birth child. In severe cases, the baby is given massive blood transfusions through the navel. If there is any risk at all, hospitals routinely do extensive blood testing to be fully prepared for the possibility. Two weeks after birth, the "tests that they did at the hospital" could contain or produce the full DNA panel required for positive identification.
I am certainly not a medical professional, but I am an RH factor parent of three children, so it's JMO
