Even if there was a trial, he wouldn't have gotten the death penalty.
Besides, he'd probably die of old age in prison anyway before he'd be put to death.
I'm no expert on the law, but why is it that he wouldn't have gotten the death penalty? What does qualify for the death penalty in Utah? How many do you have to kill, 5,10, 15 people? He killed this woman and her unborn child while she was sleeping! For crying out loud, what is his defense against the death penalty. Is he going to claim that he did it because he loved her? Or maybe it's just the fact that she was his wife and the baby was his child, and he can do whatever he wants with them? Sadly, the legal system has two definitions of justice when it comes to murder. If your spouse murders you, the penalty will not be as severe as it would be if a complete stranger did it. To me it doesn't matter, murder is murder, and death is death. There are no two ways to look at it.