Bikash Mishra, brother of key accused Vinay Mishra, was arrested by the CBI in 2021, and was later granted bail; the CBI had quizzed TMC leader Abhishek Banerjee in the case
source https://www.thehindu.com/news/cities/kolkata/kolkata-police-arrest-one-more-person-in-coal-smuggling-scam-case/article68906840.ece
source https://www.thehindu.com/news/cities/kolkata/kolkata-police-arrest-one-more-person-in-coal-smuggling-scam-case/article68906840.ece