Rio : Sgt . Marco Antonio Alves is being called a ` ` hero '' by Rio 's people for killing the gunman . NEW : Many of the slain students will be buried Friday , state - run media says . CNN 's Rafael Romo and journalists Luciani Gomes and Catalina Arica contributed to this report . The attacker committed suicide , police say . He was a former student of the school , the government says .
Rio : Sgt . Marco Antonio Alves is being called a ` ` hero '' by Rio 's people for killing the gunman . NEW : Many of the slain students will be buried Friday , state - run media says . The attacker committed suicide , police say . He was a former student of the school , the government says .