I guess....I mean...
If Casey were bipolar, and her disorder was so severe at times that it caused her to exhibit such extreme behavior, WHY didn't any friends come forward and say that they noticed these signs? Especially in the last month? I mean, it seems like if mania were so severe as to warrant, say, partying at Fusian while her daughter is dead or missing, it stands to reason that other symptoms would have manifested itself in other ways, and that someone would have noticed?
It just seems awful convenient that the only symptoms of this disorder she showed were the symptoms that caused her to lie, cheat, and steal in secret. Did no friends notice any of those symptoms in the month she was missing from Cindy's?
I mean, admittedly, I don't know much about Bipolar disorder- I am very close with someone who was diagnosed with it, but she acts nothing like this...hers is more of mood swings, manic depression at times, times of extreme happiness, and feeling invincible, then exploding...but is noticeable. It's not like she lies and cheats in secret, and is totally normal on the surface, to all of her friends.
Maybe I just don't know enough about it.
Maybe that's what the defense is counting on...the jury not knowing enough about it, or there being a wide range of experiences with people having it...
Just my thoughts. Who knows.