NEW : Memphis ' police chief says the suspect carried ` ` a fight all night '' Eduardo Marmolejo told investigators his principal ` ` made him angry , '' police say . The head of Memphis Junior Academy was found lying in a pool of blood . The teenager is released without bond after a juvenile court hearing , a probation official says .
NEW : Memphis ' police chief says the suspect carried `` a grudge all summer '' Eduardo Marmolejo told investigators his principal `` made him angry , '' police say . The head of Memphis Junior Academy was found lying in a pool of blood . The teenager is held without bond after a juvenile court hearing , a probation official says .