What I find particularly interesting, is that the "accredited lab" (presumably accredited by the FDA), just came back with a (misleading) negative result, but that 23andMe, which presumably was not accredited by the FDA at the time, provided results that cleared the issue up.
Finding that the father has contributed ~1/4 of his genes to the child would normally exclude them from being described as the biological parent, who would normally contribute ~1/2 his genes to the child.
Possibly the father had no brothers, therefore no-one else could contribute even 1/4 of the genes (unless the child is a chimera from two fathers...).
