CHENNAI: A 45-year-old man who allegedly murdered his sister and enacted an accident drama was arrested by the police on Saturday. Police said Chellammal (58), a resident of Acharapakkam, was found dead on November 2. During enquiry, police found that Chellammal and her brother Subramaniam had a fight and he hit her with an iron rod. But he told police that she slipped and fell.