I Deal Friendship

It's a murder mystery of Ankush Desai. His best friend Kush is accused for the killing. He is long time drug addict. Police interrogates him to find out the truth behind. Kush tries to Explain, how he is not guilty and Ankush was killed by a ghost. Now the question is how will Kush prove his innocence because law needs evidence and how can he prove the very existence of ghosts, when u cant see them.