The investigation has expanded beyond the deaths of a young couple, with police examining alleged drug use, party gatherings and financial transactions linked to a Kolkata flat.
Goutam Das landed himself in major controversy after she shared an image of himself brandishing a firearm on social media.
These 82 officers were moved to district postings in 2016 after they allegedly followed Election Commission of India (ECI) guidelines during the Assembly elections instead of informal directions reportedly issued by ruling party functionaries at the time.
The Kolkata Police has terminated Biswas after his arrest last week by the central agency.
Since the BJP came to power in West Bengal, law enforcement agencies have launched multiple actions against individuals accused of involvement in violence, intimidation and other criminal offences allegedly committed during the previous regime.
Kolkata Police (KP) commissioner Manoj Verma will hold a meeting with Kali Puja organisers in the city at Dhono Dhanyo auditorium on 15 October for a peaceful and pollution-free Kali Puja and Deepavali festivals.
The teacher of a reputed missionary-run school in Kolkata was detained by the Kolkata Police on Friday after he was moving through the road carrying an air pistol in his bag.
BJP leaders and workers led Leader of Opposition in state Assembly Suvendu Adhikari led a procession in Kolkata on Sunday, targeting the West Bengal government over recent electrocution deaths in the city.
In view of the inclement weather coinciding with idol immersion in the river Hooghly on Dashami day on Thursday, the Kolkata Police and the Kolkata Municipal Corporation (KMC) have taken several steps to ensure no untoward incident occurs during the process.
Kolkata Police have taken special measures to ensure law and order across the city ahead of Durga Puja, with Police Commissioner Manoj Verma recently issuing several guidelines in this regard in the monthly crime meeting, a senior police official said on Monday.
