Why is CBI empty-handed in Sushant Singh Rajput case? | Bharat Ki Baat (29.09.2020)

Five investigative agencies including the Central Bureau of Investigation (CBI), Enforcement Directorate (ED), Mumbai Police, Bihar Police, and even Narcotics Control  Bureau (NCB) are trying to find clues and pieces of evidence related to the death case of actor Sushant Singh Rajput. The search has been underway for more than 108 days now but nothing worthwhile has been found out as yet.

Why has the attention been diverted from Sushant's death case probe to drugs?