I'm amazed the Media didn't manage to convict him, despite how hard they tried.
Everyone likes to talk about how they'd vote, or what they'd do. The media simply caters to that with show trials and "investigations", showing us distorted and idealized versions of this. It's the same reason why in the middle of a crisis, or when in the presence of a celebrity you'll find plenty of people whipping out their phones, and nobody actually doing anything useful. We feel important when we're around important people... or important events. We try to assure ourselves of our own relevance in whatever situation is placed in front of us. The terrorist attacks on 9/11 didn't directly affect more than a tiny, tiny fraction of the population, but everybody got emotionally involved in it, because it was spectacular, epic, and we wanted to insert ourselves into the story, the conversation, the dialogue. Show trials like this are based on this same emotional need, and the media is only too happy to indulge in it -- it sells more papers, more advertisement, etc.
But the overwhelming majority of it is total shit, and frankly harmful to our way of life. Whether Zimmerman is guilty or not, he'll never have another job. He'll always be "that guy that got away with murder", irrespective of the actual, judiciary merit of that position. There have been many people, for example, accused of rape, and were later proved not just not guilty, but totally and irrefutably innocent of the charges. Their lives were still over all the same.
The founding fathers knew this -- that's why they advocated jury trials in the first place. It was an attempt to remove this mob mentality from the judicial process, and as a balance against populism swaying the government and giving in to the transient emotional outbursts of the crowd, the mob, the public. I don't think, if they were alive today in the age of the internet and instant communication, they would still advocate that these trials be open to the public... I believe they would have wanted a person who, if found not guilty, could go back to the life they had and the community would treat them no differently. Conversely, the country was still a "big" place, in terms of social circles -- someone convicted and having served their time, could move somewhere else, start a new life, and leave their mistake(s) behind them. Neither option is possible nowadays...
Today, our justice system may still beat back the mob mentality and the public's need for vengance, and the corruption of the media, but once a person leaves the system -- guilty or innocent, their lives are irrevocably changed. And rarely is it for the better.