This is not rocket science. Get the kid to disrobe, and it's quite obvious it's a girl, not a boy. Little children can easily distinguish between male and female.

When something looks fishy, the rule is: Follow the $$$$. There's a whole industry growing up around trannies. Not just the surgery, but lifelong addiction to hormones and (inevitably) lifelong "counseling" by so-called mental health professionals. Convince vulnerable and unhappy people that they are "really" the opposite sex, and you can get them hooked for life and watch the money roll in. What branch of medicine makes money off people who are healthy and satisfied with life? Plastic surgery makes a killing off people who are unhappy with their appearance. The tranny industry takes that even further, not just mutilating the physical body, but also pumping it full of drugs and sending the patient for counseling for the rest of his life. Capitalism is a great thing in itself, but this kind of nonsense should not be legal, and it would be an even worse crime to have this stuff paid for out of insurance. Making sane, healthy people pay for the mutilation of delusional individuals it not justice, it's a crime.