NEW : ` ` Average attendance , average grades , '' says school principal . Officials identify the shooter as Jacob Tyler Roberts , Jr . The families of the victims who died -- Yuille and Forsyth -- provided brief comments through authorities but asked for privacy as they mourn . A school employee heard the suspect say he was the gunman . ` ` I ca n't believe he did this , '' a friend of the shooter says .
NEW : ` ` Average attendance , average grades , '' says school principal . Officials identify the shooter as Jacob Tyler Roberts , Jr . A school employee heard the suspect say he was the gunman . ` ` I ca n't believe he did this , '' a friend of the shooter says .