“What did you do when my son was murdered? My son buy medicines for me. Fifteen days ago, he came to see me. My son loved me very much. I’m losing my mind... Please do something… Ensure justice for my son,” wailed 80-year-old Gita Bala Sarker, mother of school teacher Utpal Kumar Sarker, who died after a student hit him with a cricket stump on June 25.