Original sentence: After letting off the Bofors accused, Oppositions have never tired to call it the 'Congress Bureau of Investigation'.It is often suspected that ruling governments interfere with the work of the CBI, and the handling of the Bofors investigation by CBI under Congress governments has created a new synonym for CBI
Edited sentence: It is often suspected that ruling governments interfere with the work of the CBI, and the handling of the Bofors investigation by CBI under Congress governments has created a new synonym for CBI - 'Congress Bureau of Investigation' by Opposition parties especially after letting off the Bofors accused