3.1 What is Impeachment?
Impeachment is the process of attacking a witness's credibility. When you impeach a witness, you are telling the court that this witness should not be believed. It is the nuclear option of cross-examination - devastating when successful, but risky if poorly executed.
Grounds for Impeachment
- Prior Inconsistent Statements: What they said before contradicts what they say now
- Bias or Interest: They have a reason to lie or shade the truth
- Incapacity: They could not have perceived what they claim (vision, hearing, distance)
- Character for Untruthfulness: Reputation for dishonesty (limited use)
- Contradiction by Other Evidence: Other evidence proves them wrong
Impeachment is destructive cross-examination. Before attempting it, ask: Is it necessary? Can I achieve my goals without destroying this witness? Remember - if impeachment fails, the witness's credibility is strengthened.
3.2 Prior Inconsistent Statements - Section 145 BSA
Section 145 BSA is your primary weapon for impeachment. It allows you to contradict a witness using their own prior written statements. Master this section, and you master impeachment.
The Section 145 Procedure
- Cross-examine freely: You can ask about prior statements without showing the document
- Draw attention: Before proving contradiction, call witness's attention to the specific portion
- Prove the document: After drawing attention, prove the contradictory statement
- Establish contradiction: Show the court the inconsistency
You MUST draw the witness's attention to the contradictory portion BEFORE proving it. Failure to do so makes the contradiction inadmissible. This is a mandatory procedural requirement under Section 145 BSA.
3.3 The Impeachment Technique - Step by Step
Step 1: Commit the Witness
Get the witness to clearly commit to the position you will contradict:
Q: You were standing just 5 metres from the incident?
A: Yes.
Q: Not 10 metres, not 15 metres - you say 5 metres?
A: Yes, about 5 metres.
Q: You are certain about this distance?
A: Yes.
Step 2: Validate the Prior Statement
Establish the authenticity and circumstances of the prior statement:
Q: You gave a statement to the police on 15th January?
A: Yes.
Q: This was two days after the incident?
A: Yes.
Q: Your memory was fresh at that time?
A: Yes.
Q: You told the police the truth?
A: Yes.
Q: The statement was recorded in your presence?
A: Yes.
Step 3: Draw Attention (Section 145 Requirement)
Now draw specific attention to the contradictory portion:
Q: I am showing you your Section 161 BNSS statement dated 15th January.
Q: Please look at page 2, paragraph 3.
Q: Do you see where it says "I was standing approximately 30 metres away"?
A: Yes, I see that.
Step 4: Establish the Contradiction
Now prove the contradiction clearly for the record:
Q: So on 15th January, two days after the incident, you told police you were 30 metres away?
A: That is what is written...
Q: But today, in court, you say you were 5 metres away?
A: Yes, I was closer...
Q: 5 metres and 30 metres - a difference of 25 metres?
[Do not ask for explanation - stop here]
After establishing the contradiction, STOP. Do not ask "How do you explain this?" or "Why did you lie?" These questions give the witness an opportunity to rehabilitate. The contradiction is on record - let it speak in your arguments.
3.4 Sources for Impeachment
Section 161 BNSS Statements
Statements recorded by police during investigation are the most common source. Key points:
- Not admissible as substantive evidence (Section 162 BNSS)
- Can be used ONLY for contradiction
- Must be signed by witness and IO
- Compare exact language - not paraphrased versions
First Information Report (FIR)
If the witness is the informant, the FIR can be used for contradiction:
- FIR is a public document
- Contents can contradict later testimony
- Omissions in FIR are significant (why not mentioned if true?)
Other Documents
- Affidavits: Sworn statements filed in court
- Previous Testimony: Evidence in related proceedings
- Letters/Emails: Written communications
- Medical Records: Contemporary documentation
- WhatsApp/SMS: Electronic communications (with proper foundation)
Always obtain certified copies of 161 statements before trial. Study them thoroughly. Mark every potential contradiction. Prepare your impeachment sequence in writing before cross-examination.
3.5 Impeachment Through Bias
Bias impeachment does not attack what the witness said, but WHY they said it. You show the court that the witness has a motive to lie or shade the truth.
Types of Bias
- Relationship Bias: Family member, friend, employee of a party
- Financial Interest: Stands to gain financially from the outcome
- Animosity: Personal grudge against a party
- Fear: Threatened or intimidated
- Self-Interest: Protecting themselves from liability
Q: You work for the complainant's company?
A: Yes.
Q: He is your employer?
A: Yes.
Q: You want to keep your job?
A: Of course.
Q: The complainant asked you to testify?
A: He mentioned the case...
Q: And you agreed to come and support his version?
"When you cannot attack the testimony, attack the witness. When you cannot attack either, show the court why this witness would want to lie. Bias is often more powerful than contradiction." Adv. (Dr.) Prashant Mali
Key Takeaways
- Section 145 BSA is mandatory - draw attention before proving contradiction
- Follow the four-step technique: Commit, Validate, Draw Attention, Establish
- Never ask for explanation after establishing contradiction
- Prepare impeachment sequences before cross-examination
- Bias impeachment attacks motive, not facts
- Impeachment is risky - failed impeachment strengthens the witness