First off, where do you live? Check your state laws about taking in wild snakes of any species. And be sure what species you actually do have. Because I know in a lot of states Pines are protected. So you might be better off releasing him in the general area where it was found.
But that aside, care for this species is similar to other colubrids. But they tend to like it a little cooler. I find my stuff is uncomfortable in temps much over 80. Be sure to have a spot in the cage that does get to around 82 in case they want it, but I find my pines stick to the cooler areas most of the time. Not that they don't use that hot spot. They just don't use it when I've been watching.
Make sure they have a good way to hide out of sight. Though they are active during the day, babies like to have a place to get away, and thus feel secure. In this same thought, don't start out with a HUGE cage, this can make a baby snake feel too insecure and it won't feed. Have a small water dish that it can find easily. This is done by placing it on the side against a wall. If you look at the top of this forum there should be a FAQs link, and following that should lead you to a page that can tell you a lot more about Pines. Best of luck.
But again, check your laws and regulations first.
