Incorrect PIN www.avert.org/africa-hiv-aids-statistics.htm At the press conference, O'Mara said it was "very surprising" the state decided to delve into issues regarding Zimmerman's past. It is a move which he said could "open up" the case to make Martin's past relevant as well. Prosecutors called to the stand a military attorney who taught Zimmerman in a criminal litigation class, in which he said Florida's self-defense law was discussed at length.