One army officer told me after the massacre in a personal meeting that all 5 weapons that Dipendra was allegly using altogether weighed more than 20 kg. He said that it is almost impossible to carry such a weight by a person, and to manage them in one hand or other by a drunk person. If he really killed them, why did he need 5 weapons? Why not just one or two? Carrying just one or two and killing them would be swifter and easier which he knew as he was a good shooter. So, it supports the hypothesis that at least two or more other persons involved in the shooting.