To cut this short, the BTC was stolen, this boy doesn't even know anything about JAVA Script, front end or even how to build a website, he was feeding his father wrong information.
It has nothing to do if someone knows javascript, or any other programming languages just to know how to use a wallet, access to an exchange and own a Bitcoin.
This boy and his friend choose to rob people online and he is only 18 years old
This is no longer a kid. If this guy is doing frauds and scamming people, just give him an advise that he should be prepared for any consequence that might retaliate to him at the right time.
IMHO, there is nothing wrong if a kid wants to know something about Bitcoin and blockchain. Guidance is still a must but when someone who's grown up, they're already on their own moves and actions but still need to be guided.