LUCKNOW: A 22-year-old mechanic who was beaten with a stick on Thursday for standing up to his sister's tormentor succumbed to head injuries on Friday. A case has been lodged, but the accused is on the run. Daliganj resident Kirtan Rawat along with brother Rohit confronted Fazal who allegedly harassed and abused his younger sister. Fazal reportedly attacked Kirtan and fled when the youth slumped to the ground bleeding.Hasanganj police said the youth was assaulted on Thursday night and he died at Balrampur hospital. "Initially, we had lodged a case of culpable homicide not amounting to murder, but now it will be converted into a murder case," said SHO Amar Nath Verma