Center for Media and Democracy has this up on the details of Zimmerman’s history of violence against women and interfering with a friend’s arrest. I know the legal reasons for not putting Zimmerman’s past history up–the law wants to prosecute for the offense at hand, not for past offenses. I think it comes from two ideas–one being you can’t be prosecuted for the same crime twice (double jeopardy) and two, the country has the view that everyone should get a second chance to change their ways…and a person should be viewed with a clean slate.
However, if they are going to bring up Trayvon’s past, it would seem the fair thing to do would to allow for Zimmerman’s past to be explored, as well. There needs to be balance.