It's just my opinion...but DB was apparently told by LE that she failed her poly, this however, has never been confirmed by LE. But I believe they did tell her that and I believe they lied. Although polygraph results are not admissible in a court of law, they are most certainly allowed in the court of public opinion and often times serve only to sway said opinion. It has also been reported that the cadaver dogs hit on a location in DB & JI's bedroom, I believe this too was a lie, designed by LE to put public pressure on DB. There is also the little fact that LE continues to say that DB & JI aren't cooperating, aren't answering certain questions, all the while DB & JI insist through their attorney that they are cooperating. So failed poly, drunk mom, decomp in bedroom, and not cooperating...I'd pretty much say they have vilified DB.
With that said; I agree wholeheartedly that DB was extremely irresponsible to get drunk while caring for the children, but I do not believe that makes her a murderer. I don't even know if I believe that makes her 100% responsible for the disappearance of her daughter. Who knows, she could have been stone cold sober and Lisa might still have been abducted.
Again it's just my opinion and that I believe is the greatest thing about WS, everyone is entitled to their opinion.