So his intent was to take the life of Caleb?
One doesn't need specific intent to take a life in order to be guilty of murder. One can be so reckless in one's behavior that loss of life is a very predictable result. An analogy is getting drunk, getting behind the wheel and killing someone.
2nd degree murder does not require intent or premeditation.
He said the ride could kill people. He knew that was a distinct possibility. That’s what is required for 2nd degree murder.