Why throw the baby in the dumpster?

I heard on the news today that a woman here in AZ threw her baby in the dumpster. Why? I hate this thinking. Here are women like me, unable to have children, that would take that child in a heartbeat, no questions asked. You don't even have to tell me why! Just hand over the baby on be on your way. I don't understand this. I think women like this should be given the death penalty.