If you are a law student, young lawyer or someone trying to understand criminal procedure in India, one question comes up very often: what happens after an FIR is filed?
Many people assume that once an FIR is registered, the accused is immediately arrested and the case automatically goes to trial. That is not how the process works.
An FIR is only the starting point of the criminal investigation process. What happens next depends on the nature of the offence, the evidence available, whether the police consider arrest necessary, what witnesses say, and what the investigation ultimately reveals.
Under the Bharatiya Nagarik Suraksha Sanhita, 2023, or BNSS, the police follow a structured investigation process after registration of an FIR. The BNSS has been in force since 1 July 2024 and now governs criminal procedure in place of the Code of Criminal Procedure, 1973. This guide will help you understand the procedure after FIR registration in India in a practical, step-by-step manner.
What is the first thing that happens after an FIR is registered?
Once an FIR relating to a cognizable offence is registered, the police can begin investigating the case.
Section 175 of the BNSS empowers the officer in charge of a police station to investigate a cognizable case without first obtaining an order from a Magistrate. Section 176 then deals with the procedure to be followed during investigation.
In practice, this means the investigating officer begins trying to answer basic questions such as:
- What exactly happened?
- Where did the alleged offence take place?
- Who was present?
- Who may have committed the offence?
- What evidence is available?
- Are there witnesses?
- Is any immediate search, seizure or recovery necessary?
The police may visit the place of occurrence, inspect the scene, collect documents, obtain CCTV footage, examine electronic records and identify persons who may know something about the incident.
This is why, when you study FIR procedure under BNSS, you should remember one basic distinction: registration of an FIR starts an investigation, but it does not establish guilt.
An FIR contains the initial information relating to the alleged commission of an offence. The allegations still need to be investigated and tested against the evidence.
How do the police collect evidence after an FIR?
Evidence collection is one of the most important stages after FIR registration.
The investigating officer may collect physical, documentary, electronic, medical and forensic evidence depending on the nature of the case.
For example, an investigation may involve:
- CCTV footage from the place of occurrence
- Mobile phones and electronic devices
- Emails, messages or digital records
- Documents and financial records
- Weapons or other physical objects
- Medical reports
- Photographs or videos
- Forensic samples
- Recovery of stolen or disputed property
Under Section 176(3) of the BNSS, where information relates to an offence punishable with seven years or more, the statutory framework provides for a forensic expert to visit the crime scene and collect forensic evidence, along with videography of the process, subject to the implementation mechanism contemplated by the provision.
This is an important development for anyone learning criminal litigation. Modern criminal investigation is no longer limited to oral statements and physical documents. Electronic evidence, forensic material and digital chains of custody can become central to the case.
If you are building your litigation skills, understanding how facts are converted into legally usable material is just as important as knowing the bare provisions.
What happens to witnesses during the police investigation?
Witness examination usually forms a major part of the investigation.
Sections 179 to 181 of the BNSS deal with requiring the attendance of witnesses, examination of witnesses by the police, and the use of statements made to the police.
The investigating officer may question people who appear to be acquainted with the facts and circumstances of the case.
What can the police ask a witness?
The police may ask a witness about facts relevant to the alleged offence.
For example, the officer may want to know:
- What the witness saw or heard
- Whether the witness was present at the scene
- Whether the witness knows the accused or victim
- What happened immediately before or after the incident
- Whether the witness possesses any document, video or other relevant information
Statements recorded during police investigation can help the investigating officer reconstruct the events and decide what further investigation is required.
Is a police statement the same as evidence in court?
No.
This distinction is extremely important for law students.
A statement given to the police during investigation is part of the investigation process. It should not automatically be treated as the same thing as testimony given before a court during trial.
The evidentiary use of police statements is governed by procedural and evidence law.
This is also where your understanding of cross-examination becomes important. A witness may later enter the witness box, give evidence before the court and be questioned by the opposite side.
Does filing an FIR mean that the accused will immediately be arrested?
No.
This is perhaps one of the biggest misconceptions about FIRs.
The registration of an FIR does not automatically require the police to arrest every person named in it.
The BNSS separately regulates the power of arrest. Section 35 also provides for a notice of appearance in circumstances covered by the provision. The prescribed notice itself states that a person may be required to appear during investigation where there are reasonable grounds to question that person regarding the facts and circumstances of the case.
So, depending on the case, the police may:
- Arrest the accused where the legal requirements for arrest are satisfied
- Issue a notice requiring the person to appear before the investigating officer
- Question the person without arrest
- Continue collecting evidence before deciding whether arrest is necessary
As a young lawyer, do not confuse the police’s power to investigate with the police’s power to arrest.
They are connected, but they are not identical.
What happens if the accused is arrested?
If the accused is arrested, a separate set of procedural safeguards becomes relevant.
The arrested person must be dealt with in accordance with the BNSS and constitutional safeguards relating to personal liberty.
Among other protections, the arrested person must be informed about the grounds of arrest and cannot simply be kept indefinitely in police custody.
Sections 57 and 58 of the BNSS deal with taking an arrested person before the Magistrate and the limitation on detention beyond twenty-four hours in the ordinary course without judicial authorisation.
If the investigation cannot be completed within twenty-four hours and further custody is sought, the matter moves before the Magistrate under Section 187.
The Magistrate then exercises judicial control over further detention.
If you are preparing for criminal litigation, this stage is closely connected with bail practice. It is therefore useful to understand how a bail application works under BNSS alongside the post-FIR investigation process.
Can the investigation continue even after arrest or questioning?
Yes.
Arrest does not end the investigation.
In many cases, substantial investigative work continues even after the accused has been arrested, questioned or released on bail.
The police may continue to conduct searches, make recoveries, examine additional witnesses, collect digital evidence, obtain forensic reports and verify different versions of the incident.
Section 192 of the BNSS requires a diary of proceedings in investigation, commonly referred to as the case diary.
A case diary helps record the progress of the investigation and the steps taken by the investigating officer.
Another important BNSS requirement appears in Section 193. The police officer must inform the informant or victim about the progress of the investigation within ninety days, including through electronic communication.
From a practical perspective, this means an investigation can involve many parallel steps rather than one simple sequence.
What happens when the police complete the investigation?
Once the investigation is complete, the investigating officer has to submit the police report to the Magistrate.
Section 193 of the BNSS deals with the report of the police officer on completion of investigation. The report contains important details such as the parties involved, the nature of the information, persons acquainted with the circumstances, whether an offence appears to have been committed, whether the accused was arrested, and related investigation details.
Broadly, the investigation may lead to different outcomes.
What happens if there is sufficient evidence?
If the police conclude that sufficient evidence exists to proceed against the accused, the matter may be forwarded to the Magistrate and a police report commonly referred to as a charge sheet is filed.
The prosecution may then rely on the materials collected during investigation, including relevant documents and witness statements.
The filing of a charge sheet still does not mean that the accused has been convicted.
The court must independently proceed according to law, and the prosecution must ultimately prove its case at trial.
What happens if the evidence is insufficient?
If the investigation does not disclose sufficient evidence against the accused, the police may submit what is commonly referred to as a closure report or final report.
Section 189 of the BNSS separately deals with release of an accused when the evidence is deficient, while Section 193 governs the final police report.
The Magistrate then considers the police report and proceeds according to law.
Can further investigation happen later?
Yes.
Section 193 also recognises further investigation after the police report has been submitted. If additional evidence is subsequently discovered, a further report may be forwarded to the Magistrate.
So, even filing of the initial police report does not necessarily mean that investigative activity can never continue.
How is an FIR different from a criminal complaint?
This distinction becomes especially useful when you begin working in trial courts.
An FIR is ordinarily registered with the police in relation to information concerning a cognizable offence. A criminal complaint, on the other hand, may be made before a Magistrate.
That means not every criminal proceeding begins through an FIR.
If you want to understand the alternative route in greater detail, read LawMento’s guide on what a criminal complaint is.
Knowing the difference helps you understand why some matters begin with police investigation while others begin directly before the Magistrate.
What should you remember about the entire FIR process?
The easiest way to understand what happens after FIR registration is to remember the sequence:
FIR registered → Investigation begins → Evidence collected → Witnesses examined → Arrest or notice, where required → Investigation continues → Police report filed → Court proceedings follow
But keep one principle at the centre of the entire process:
An FIR is an allegation that triggers the criminal process. It is not a finding of guilt.
For a law student, this distinction matters in examinations.
For a young lawyer, it matters even more in practice because every stage has different legal consequences, procedural safeguards and drafting requirements.
The real skill is not merely remembering which section comes next. You should understand why each stage exists, what document is generated at that stage, what rights become relevant and how the matter moves from investigation to judicial proceedings.
Final Thoughts
Understanding what happens after an FIR is filed gives you the foundation for almost everything that follows in criminal litigation.
Once you understand investigation, witness examination, arrest, remand, evidence collection, charge sheets and closure reports as parts of one connected process, criminal procedure becomes much easier to follow.
Instead of memorising isolated provisions, try to visualise the case moving from the police station to the investigating officer, from evidence collection to the Magistrate and finally towards trial.
Want to understand criminal litigation beyond textbooks? Explore LawMento courses and learn practical legal skills, drafting, procedure and courtroom concepts designed for law students and young lawyers.
