The jury that found Casey Anthony innocent is incredibly immune to the facts.
1) Casey Anthony didn't report her daughter missing for 31 days.
2) Far from being concerned, she went out and partied for that 31 days, and showed absolutely no signs to those around her of concern or stress about her missing daughter.
3) During this time she got the above mentioned "THE GOOD LIFE" tattoo.
4) She did about 100 keyword searches for "chloroform"
5) Caylee Anthony's body was found with duct-tape covering her mouth, and in a bag. One report I saw said it matched tape in the Anthony home.
6) Casey's car smelled like human decomposition, as described by Anthony's mother, and confirmed by multiple investigating detectives.
7) Casey lied to police repeatedly, manufacturing a fictitious hispanic babysitter, a fake job as her alibi, and other distortions that obstructed the investigation.
At the very least, all this proves Casey was complicit in the murder, if not the murderer herself. And last time I looked, "accessory to murder" was punishable with the same sentence as murder.
If the jury felt she was guilty but without enough evidence for the death penalty, they had an array of options to find her guilty, including 2nd degree murder or manslaughter. It's ridiculous.