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Of marijuana use by trayvon martin, the florida teen zimmerman is charged with killing. zimmermans defense cannot use martins toxicology report or mention his marijuana level at the time of his death. plus zimmermans attorneys have been barred from using any evidence showing that martin is familiar with guns. hes 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 ...

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 fa...

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. >> well see. when they see...

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 doesnt fit the bill carefuller. >> you dont 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 well 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. h...