VG Siddhartha, the founder of the popular chain Cafe Coffee Day and son-in-law of former Karnataka Chief Minister SM Krishna, apparently wrote to board members and employees before he went missing on Monday. The letter - accessed by news agency ANI - alleges harassment by an income tax officer and expresses regret for not being able to create "the right profitable business". VG Siddhartha went missing while walking across a bridge near Mangaluru in Karnataka on Monday. Rescue teams and sniffer dogs are scanning the bridge over the Netravati river. The Coast Guard and the National Disaster Response Force have joined the search.