Today me and my old man went mountain biking on this trail by the countryside of Tulsa, OK. We were just about done with our trek when my dad yells at me and says to get over here. I drop my bike and run over to him to find one of the most awesome sights I've ever seen. Right infront of us was a Speckled Kingsnake (4 1/2 - 5 ft) constricting a full grown Copperhead right in the middle of the trail! The Kingsnake was curled up in a ball and the Copperhead's head was looking upwards as if trying to slither away.. but you could tell it was done for as the Kingsnake already had almost the entire rest of its body constricted. I poked the Copperhead with a stick to see if it was even still alive and surely enough it bit at the stick and seemed mad and in pain. After touching the Copperhead again, it started to continuously try and bite the Kingsnake. I couldn't tell if his fangs were penetrating the Speckled Kingsnake or not. But we decided it would be best to just put the Copperhead out of its misery and stop it from damaging the Kingsnake. So we quickly crushed the Copperhead's head and bam, it was dead. After that we put it the Kingsnake and the dead & constricted Copperhead in the bag gently and carried them to the car. I was very happy because not logn ago my baby ball bpython died for unknown reasons and now I have a new and awesome snake! So when we got home I put it in my passed away python's aquarium. About 2 hours later I checked on the Kingsnake to see whats happening and he completely swallowed the entire Copperhead.. he was as fat as can be! Now the Kingsnake is just resting in the cage's substrate and sipping water.
My only questions being:
Was anything I did said above against the law? And is it ok to have killed the Copperhead and to keep this awesome Speckled Kingsnake as a pet, or would I have to let it go? Thanks!

