A man and his wife are thrill seekers. They decided to take a cross-country road-trip with enough money for only one tank of gas. Part of the thrill for them was trying to figure out how to make it to their destination without much cash. Along the way, the couple broke into empty homes to gather food and any money they could find. They also looked for jewelry and other valuables that they could pawn for cash. They specifically targeted homes in wealthier neighborhoods, as such homes would be more likely to contain valuables worth the risk of breaking and entering. One night, in one particular house, the man was waiting in the car when the wife was surprised by a homeowner who had suddenly returned home. In a panic, the wife smashed the homeowner's head with a frying pan. The man and wife, assuming the homeowner was dead, decided to cover their crime by unhooking a gas line with the homeowner inside, making it look like he had died from carbon monoxide poisoning. The wife went back to the car while the man "took care of things" in the house. However, the man never checked to see if the homeowner was actually dead. In fact, the homeowner was alive but unconscious, and he died as a result of the carbon monoxide poisoning. What is the most serious crime, if any, for which the man is likely to be convicted with respect to the death of the homeowner?