S1·E576 Bhootiya Qatil

A maid is killed in a hotel. Upon investigation , the CID team finds out that the dead killer committed suicide in front of many witnesses- the maid has seemingly been killed by a dead man. While CID are investigating the case, there is another sighting of the dead man. How could a ghost kill people? And why is he haunting the hotel? The CID team then finds 6 crore rupees hidden on the hotel premises. Does this money have any connection to the murder? And will the cops be able to find the ghost killer?