Union Information and Broadcasting Minister Arun Jaitley, who also holds the finance portfolio, on Monday demanded an independent and "credible" probe into the murder of a Bihar journalist."It is a very unfortunate incident. I think it is an opportunity for an independent probe," Jaitley said, talking to journalists at the Indian Women's Press Corp here. "I hope Nitish Kumar will realise that in all fairness that it's a kind of an attack in which the nature of probe itself will add to its credibility," added Jaitley. Jaitley was referring to the murder of Rajdeo Ranjan, Siwan bureau chief of Hindi newspaper Hindustan, part of the HT Media, who was shot dead at a busy market near Station Road in the town on Friday night.