When he learned the teen-ager was in custody and the wounded students were recovering, he began telephoning experts for advice on helping his students cope with the ordeal.

• 当他得知少年枪犯已被拘押，受伤的学生正在康复，他致电专家询问请教，怎样帮助他的学生去应付和消除这噩梦般的经历。