Reading that 'vet report' of the inside and genitals being blood while the rest was ball made my eye twitch.
It's not the owner's fault, she was trusting a "trained professional" who was supposed to have years more experience and training in her pet. Not their fault that the vet they chose apparently can't ID basic snake species.
It may be a male, as a lot of inexperienced folks don't manage to properly express the hemipenes if they don't know how to properly sex a ball python. If he 'rolled' his finger down the cloaca area then who know? Without the photo, I would have wondered if it were a legless beagle puppy.
Nothing surprises me anymore. I hope the owner does come here and find all the information they need and maybe even finds a like-minded community of reptile enthusiasts.