NEW : Attorneys say they might enter plea of not guilty by reason of insanity . T.J. Lane , 17 , is accused of fatally shooting three high school classmates in February . He has pleaded not guilty to the charges and faces life without parole if convicted at trial. Lane was indicted on six charges : three counts of aggravated murder , two counts of attempted aggravated murder and felonious assault . A judge ruled in May that he can be tried as an adult .
NEW : Attorneys say they might enter plea of not guilty by reason of insanity . T.J. Lane , 17 , is accused of fatally shooting three high school classmates in February . He has pleaded not guilty to the charges and faces life without parole if convicted at trial. A judge ruled in May that he can be tried as an adult .