When they dismember Sandy in order to sell her parts, then you’ve got a murder with a robbery. Doesn’t really matter what I say. Murder as part of an additional crime is a capital offense. George might get life in prison for the first, but he’ll be eligible for the death penalty with the 2nd.
But that strays from the fact that they were killing babies to take their parts to put them in rats to grow them to sell for organ transplants.
Not shown. They were killing babies for various reasons, most often the convenience of the "mother."
IOW, these babies were going to be killed anyway.
I also think the analogy of robbery is not a good one.
Even if George kills Sandy to sell her body parts, I think he's highly unlikely to be charged with theft.