Why Aren't the Men Considered Crazy?

I was sitting here reading this story about a murder similar to the one for which Scott Peterson has been convicted. http://tinyurl.com/6waoe The killer, Todd Garton, murdered his very pregnant wife and was sentenced to death.

What I noticed was that no one ever questioned Garton or Peterson's sanity. They seemed to decide that these men were evil, but sane. This is different than Andrea Yates or Deanna Laney who society decided were insane right away.

There are some important differences in the cases ... the men murdered an adult woman and an unborn fetus while the women murdered defenseless children.

But still ... there isn't even a hint that these men might be insane. Not even gossip. Interesting.