Can I keep a sea turtle?/How do I incubate a sea turtle?

I just found a sea turtle egg on the sand of the beach. I know they are illegal to keep. But I found the egg in the sand and it was in people's tracks. It is not in its nest and in people's tracks where people will either step it or little kids will do something stupid with it. I know it already doesn't have much of a chance, but it's worth trying. I tried to imitate the mother's incubation site. I have the egg in a a cup of sand where it is tight so it cannot fall off and when/if it hatches it will fall into a bowl i have of salt water. Can this possibly work? If it does, is it possible to keep?