The unlawful killing of a human being, when perpetrated by any act imminently dangerous to another and evincing a depraved mind regardless of human life, although without any premeditated design to effect the death of any particular individual, is murder in the second degree and constitutes a felony of the first degree, punishable by imprisonment for a term of years not exceeding life or as provided in s. 775.082, s. 775.083, or s. 775.084.
I am doubtful they can prove that. As far as I know Florida doesn't allow the Jury to convict of a lesser offense that is not charged, and the only count against Zimmerman right now is second degree. If the DA hadn't been pressured by the public so much they might have been able to secure a conviction on some other charge, but they've put all their eggs in the second degree basket and I don't see that resulting in a conviction. There's just no evidence of "a depraved mind regardless of human life,"