Yeah, they can survive in captivity, if that's what you choose to do. As you probably know, they're non-venomous (assuming you've not confused it with a coral snake...), they feed on small lizards, rodents and *ahem* snakes...

I'd imagine you can probably find one in a pet store somewhere, as people do breed them. This is, in my opinion, a much better idea than keeping a wild one that you've caught. At least if it's been bred in captivity, there's no chance of it being distressed at no longer being free.