I have listened to them and don't recall anything that screams "2nd degree murder". Perhaps I will give them another listen.
As for defending Zimmerman? No, I'm not defending him, but I'm also not rushing to judgement. Especially this case which has few to NO eyewitnesses, and so much contradictory "evidence". If the man killed Trayvon and violated Florida state law, he deserves whatever the justice system sees fit to hand out. However, rushing to judgement often puts innocent people in prison. I have a REAL problem incarcerating innocent people. I don't know if he's innocent or not, but there seems to be little to NO physical evidence and a whole lot of speculation. I'm not about to send anyone to prison for life (or even a day for that matter) simply because it appears one way. On the surface, I admit, it looks horrible for Zimm, but upon closer examination a whole lot of reasonable doubt seems to be lurking around every corner. Any decent criminal defense attorney already knows this and will exploit it. I think the state has an uphill battle proving Murder 2 beyond a reasonable doubt. They may even have trouble with manslaughter given the lack of evidence.
http://www.palmbeachpost.com/news/state/why-are-so-many-innocent-people-convicted-of-746194.html