Actor Sonu Mmishra opened up about quitting 'Kala Hiran', a film set to be based on Salman Khan's blackbuck poaching case. "I was supposed to portray Salman's character," he said, adding, "When I realised that the film had been made to tarnish the name of a superstar...my ethics didn't allow me to be a part of...propaganda against a senior actor."