[ArmstedFragg]

They’re trying to throw enough dirt on him that he’ll be forced to take the stand to correct it, letting Bernie beat him up. It’s not going to work, and given the stellar work they’ve done so far, they’ll probably accidentally open the door to Trayvon’s history.

[Cboldt]

Martin's reputation can come in without the state doing anything to open a door. It's a defense prerogative, allowed under the rules of evidence. But is has to be reputation evidence, not single acts.