Days after the murder of senior crime editor of 'Mid Day', Jyotirmoy Dey, in broad daylight in Mumbai, dozens of journalists today sat on a hunger strike to demand justice for their slain colleague J Dey.Lashing out at the slow process of investigation by the state police, a senior journalist, Prashad Kathe, demanded an inquiry by the Central Bureau of Investigation.Kathe said the journalists' community also wanted a law to prevent attacks on journalists to be produced in the upcoming monsoon session of the Indian parliament.