(CNN) -- For nearly two months, George Zimmerman has been largely a cipher, a riddle whose voice has been heard only in 911 calls reporting a young man acting "real suspicious." On Friday, the world learned more about Zimmerman as he, his wife and parents testified during a hearing in Sanford, Florida, to decide whether he would be released on bond while awaiting trial on a second-degree murder charge in the February 26 death of Trayvon Martin. Zimmerman's wife depicted him as a man she has never seen angry. His father said he was a truthful man who had long been concerned with helping others. And his mother said he had organized a campaign to "get justice" for a homeless man who had been beaten in Sanford, as well as mentoring a 14-year-old African-American boy from a dangerous Orlando neighborhood.
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More details emerge about George Zimmerman at bond hearing
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His mother says he is "very protective of people"
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But a prosecutor says he's a violent danger to the community
Zimmerman has acknowledged killing Martin during an encounter in his @placeholder neighborhood, saying he shot in self-defense.