Firstly, pretty is relative and KC, 31 days never reporting and, her lies was the first we knew of her. Caylee is/was pretty that's what has the nation polarized against KC, KC looks good-ish at times but is pretty darn ugly overall (inside) given her lies, stealing, treatment of everyone and attitude in helping find Caylee [at that time].
Secondly, there is an emerging copycat case with Elizabeth Johnson and baby Gabriel. EJ is in jail. EJ is telling lies, not helping LE, no providing photo composites, the baby is gone, time is running out, etc.
S'funny that EJ is pretty and yet LE are trying HARD to give her the benefit of the doubt, work towards Gabriel was illegally adopted or sold and, have parallel tracks.
So lets compare and track the two.
If evidence emerges that Gabriel is no longer with us -- like the decomp in the car -- watch the public and media turn completely and fully against EJ. Is it more the lies, lack of cooperation and, child deceased that turns folks against these criminals?
It isn't pretty or ugly but culpability. It could be that it is harder for us to believe a clean cut pretty person would do such a heartless thing versus a hoodlum.
Another factor is the parents, the A's did a LOT of damage to KC and fanned the flames big-time --- when Gabriel's family are working diligently, holding vigils but -- keeping out of the spotlight IMHO.