When he told me that the girl was 16 i nearly died of a heart attack but apparently the age of consent is lower in ohio and he was never in any real prison danger.
That is correct, and trust me, having raised a teenage boy in Ohio, I thoroughly investigated the law. If you live in a different state, please check the laws there, so your brother will know what is and isn't legal.
Check your private messages, and I'll let you know where I live. Maybe your brother is close by.