George Zimmerman's defense team was dealt a blow today: The judge ruled that it can't bring up certain unflattering details about Trayvon Martin at trial, unless it "clear[s] several legal hurdles" to get permission at another ruling, the Orlando Sentinel reports. Among the things the defense can't mention: Trayvon's marijuana use, suspensions from school, and alleged fighting, all of which were revealed in text messages released by the defense, plus the fact that THC was found in Martin's system at his autopsy. NBC News explains that the judge will consider admitting each piece of evidence on a case by case basis during the trial, but that the defense cannot discuss any of the above during opening statements. (More George Zimmerman stories.)