Um...in the beginning, I think JB could have believed, as so many did, that an accident happened, that Caylee was sold, or otherwise given away. Generally, a lawyer does not want to know anyway.
But, a lawyer does need to know some things. A lawyer representing someone in a DUI case will certainly ask his client to explain to him what happened. Within that explanation, the client will likely make some sort of admission. I suppose this case could have been different.
But, at some point, KC had to tell JB she was lying about Zenaida.
What an attorney does next is where it counts, and there can be several directions to go. Remembering the OJ case, I always thought it was apparent in Robert Shapiro's face that he knew what OJ had done and he was disgusted. Johnny Cochran had a better poker face. Both defended their client, Cochran more vigorously than Shapiro, IMO. Cochran used the race card as it was a very strong tool in the aftermath of Rodney King. Dispicable? Yes. Effective? Very. But from what I recall, Johnny Cochran used what little he had and worked with it and around it-He did not create a massive series of misinformation and lies. And speaking of the OJ case, an attorney's personal life can be effected by their caseload-Ask Kris Jenner what she thought of her husband betraying her best friend.
And maybe JB's family is effected as well, we'll likely never know.
Either way, JB made a choice that I would have never made; Once it became apparent that KC was completely lying, once he found out where Caylee was, because I firmly believe she told him and the info got to DomC, it was his ethical and perhaps legal duty to forego any attempt to blame this crime on anyone else.
The classical scope of work of a defense attorney in the English justice system, all the way back to the days of the Magna Carta, is to insure that fair, and now constitutional, rights are not infringed by any king or government. I know we have come many centuries beyond that and the whole thing has morphed into putting on a spectacular case-But in my literal mind, all JB is obligated to do is to make sure that KC is not being oppressed by the government or wrongly accused by the people because of handicap, race, sex, or class-think Salem Witch burnings.
It drives me mad that the experienced attorneys of the state, who are bound to be fair, that some 80%+ of people polled early in this case, many of us in the public who knew something was hinky from the very beginning, and KC's own friends and family members knew from human instinct and common sense, that Caylee met foul play in the care of her mother-yet we have to set aside this common sense and ponder whether Roy Kronk did this? Whether Jesse did this? Whether George did this?
Americans are not cave people, we are not uncivilized, we are not riotous-for the most part. We are a people who are bound by rule of law and honestly, trust. Do we run red lights when no one is around to see it? Not most of us. Do we accuse innocent people of murder on the daily? Not most of us.
I am not in the hate Americans crowd, I believe my countrymen are fair and most especially when they are vetted by both the defense and the state.
When the evidence is so stinkin overwhelming, it is maddening that an attorrney would go to these lengths to cover up what I believe he knew whether or not KC told him. As if she is persecuted.
All JB was obligated to do was to protect her rights. He was in no way obligated to lie for her and he is, and it burns my butt.
That's his goal. Whatever it may be. 
