To play devils advocate, I’m trying to say this as facts only and not as an accusation. It’s possible that bio mom didn’t have good prenatal care, nutrition or health. Lots of things during a pregnancy can affect a child long after birth including drugs taken by mother (both prescribed and not), other substances ingested, lack of vitamins or minerals, even routine illness of the mother, etc. He also may not have had the best nutrition before, during or after his time in the foster system. Then it’s also possible he was in a car accident or broke it another unpreventable way. We don’t know if it was a serious compound femur break or a hairline fracture of the fibia. Both could be called a broken leg but they’re very different situations. My fear is that the broken bone could be used as a method of identification. The missing poster also mentioned no dental records available.