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Of marijuana use by trayvon martin, the florida teen zimmerman is charged with killing. zimmerman's defense cannot use martin's toxicology report or mention his marijuana level at the time of his death. plus zimmerman's attorneys have been barred from using any evidence showing that martin is familiar with guns. he's supposed to go on trial for second-degree murder in two week and a pretrial hearing has been going on for an hour. victor blackwell is there at the trial. >> reporter: george zimmerman himself is not in court today. we contacted his team and said it was a last-minute decision. tha...

Of the the evidence released by the defense last week. the photographs that smoke coming out of his mouth, the picture with the gold teeth, the small growing marijuana plant, the gun, all of those elements, the text messages, those will not come up in front of the jury. i want you to listen to this exchange can between the defense attorney and the judge. this was during the decision to keep out the familiarity with guns. listen. >> the drugs and the history of his chronic use of drugs and his familiarity with fighting and to a certain externt his familiarity with guns is relevant to the theory...

And justice kagan has recused herself. it will be a case decided by eight justices. >> so that means they could tie. >> they could tie. if they tie, it would be good news for the school. because it would uphold the lower court decision that said this affirmative action program was okay. but kagan is coming from the wrong side of the ledger. likely voted for the school. once again, as you know, all eyes are on our swing voter, and justice kennedy could decide the issue. >> we'll see. when they see very soon. and you will stick around in case a decision is made. a ruling is made. jonathan turley...

In columbincolumbine, colorado. killing 13, wounding 21. authorities are not saying how far along this planning was. neighbors say he was a quiet teen and doesn't fit the bill carefuller. >> you don't think that will happen in your neighborhood. you know, and especially by a quiet young man. >> reporter: the 17-year-old will be charged as an adult. now, authorities say we'll know more about this plot and how mature it was and how far off he was from carrying it out, 1:30 local time, 4:30 eastern. he will be arraigned and charged as an adult. very serious charges. carol. >> miguel marquez repor...