Generally, no — Indian law strongly disfavours filing a second FIR for the same incident, since courts have consistently held that once an FIR has been registered and investigation has commenced for a specific occurrence, a subsequent FIR covering the same facts amounts to an impermissible attempt to reinvestigate the same matter, which could otherwise be misused to harass an accused through repeated proceedings on identical allegations.

If you believe the Kolkata police investigation into your complaint has been inadequate, incomplete, or improperly conducted, the appropriate remedy is generally not to file a fresh FIR but rather to approach the concerned authorities seeking further or better investigation, including filing a protest petition before the magistrate if a closure report has been submitted, or approaching the Calcutta High Court through a writ petition seeking direction for proper investigation, particularly under Article 226 where the investigation appears to have been conducted in bad faith or with deliberate negligence.

There are limited exceptions recognised by courts where a second FIR may be permissible, such as where the subsequent complaint genuinely concerns a distinct and separate incident, even if related to the same parties or broader context, or where the first FIR was found to be entirely fabricated or a counter-complaint addressing a genuinely different occurrence, since these circumstances do not offend the general rule against duplicate proceedings for the identical incident.

Given the nuanced legal distinction between an impermissible second FIR and legitimate additional proceedings addressing genuine investigative inadequacy, it is important to consult experienced criminal law counsel who can properly assess your specific situation. Consulting the team at Aapka Legal Advice can help you determine the correct legal remedy if you believe your Kolkata police investigation has been inadequately conducted.

Given the strategic importance of pursuing the correct remedy rather than risking a legally impermissible second FIR, obtaining a second opinion from a retired judge on the best approach for your specific circumstances can provide valuable clarity. Kolkata's experienced criminal lawyers and retired judges, available through Aapka Legal Advice's Kolkata lawyer directory, regularly assist clients navigating these investigation-related challenges.

In conclusion, a second FIR for the same incident is generally not permissible in Kolkata even where the original investigation appears inadequate, making it essential to pursue the correct alternative remedies, such as protest petitions or writ relief, to address genuine investigative shortcomings.