Bhimsen felt the need to finish off his rivals, but at the same time, felt a need to take precaution before going after immediate members of the royal household. For almost two years after returning to Kathmandu, Rana Bahadur had no official position in the government – he was neither a king, nor a regent, nor a minister – yet he felt no qualms in using the full state power. Not only did Rana Bahadur carry out the "Baisathi Haran" under Bhimsen's advice, he was also able to banish all non-vaccinated children, as well as their parents, from the town during a smallpox outbreak, in order to prevent King Girvan from catching that disease. Now, after almost two-year, all of a sudden Rana Bahadur was made "Mukhtiyar" (chief authority) on 26 February 1806 and Bhimsen tried to implement his schemes through Rana Bahadur. Bhimsen had also secretly learned of a plot to oust Rana Bahadur. Tribhuvan Khawas (Pradhan), a member of Sher Bahadur's faction, was imprisoned on the re-opened charges of conspiracy with the British that led to the Knox's mission, but for which pardon had already been doled out, and was ordered to be executed. Tribhuvan Khawas decided to reveal everyone that was involved in the dialogue with the British. Among those implicated was Sher Bahadur Shah.