Several things strike me after reading this synopsis of the case:
http://www.charleyproject.org/cases/t/tucker_logan.html
There are a lot of things in common, but some differences that made it easier to convict KR than it will be for CA.
First, Katherine Rutan clearly did not want Logan. She was going to give him away and was mad that DHS was not taking him fast enough. Contrast this with Casey, Cindy and George who appear to have taken excellent care of Caylee and love her.
Second, there is a witness to the exact time Logan disappeared. The roommate heard Logan crying in the night and the next morning he was gone. Mom lied and said DHS took him. Absolute BS. Then she lied a whole bunch of other times. Contrast with a month's time span when Caylee disappeared. We still have the BS story, but at least there is the tiny shred of doubt about exactly what happened an when.
Third, there was forensic evidence in the house. Masking tape with Logan's blood and hair on it. Unless LE is keeping a tight lid on things and just waiting, they don't have enough forensics to keep Casey in jail.
Fourth, the witness who saw KR carry Logan's body and the shovel into the woods and return without him. :furious: We may have a witness like this with Casey, but they have not come forward yet or I do believe she'd be in jail.
After all of this, it still took them 5 YEARS to convict KR of murder, and Logan has still not been found. It makes me despair. What if Casey gets away with this???
And, the fact that he's never been found and she hasn't confessed really makes you think long and hard about some other parents whose children have never been found. People who think that not finding a body lends to reasonable doubt need to read this case. It is enough to give you nightmares.