That is quite unfortunate. I used to really want a chameleon when I was young, but everything I read and heard about them indicated they were for more advanced keepers and I've been scared to keep them since. I haven't done any research on them in recent years, but if my memory serves me correctly, they're more demanding than green tree pythons!!!
Anyway, I hope your nephew realizes the things he did wrong and will not repeat the same mistakes if he gets any more herps. My condolences to both of you.