She had been stabbed with a knife and was bleeding profusely. But Pallavi Purkayastha managed to escape the attacker who was trying to rape her in her flat in Central Mumbai in the middle of the night. She rushed outside her apartment on the 16th floor - and ran down the corridor, her blood staining the walls and the floor. There are four other flats on the same storey. The desperate lawyer rang at least two doorbells, investigators have concluded. Nobody answered. Neighbours have allegedly told the police that in their bedrooms, with the doors shut, they heard nothing.