Impeachment by Prior Conviction (Defendant's Testimony) is a legal tactic used by prosecutors in criminal cases to discredit the testimony of a defendant. This tactic involves introducing evidence that the defendant has been convicted of a prior felony. The evidence is introduced in order to raise doubts in the minds of the jurors as to the defendant's credibility. This tactic can be used to impeach the defendant's credibility as a witness, as the jury may infer that the defendant is prone to lying or has low moral character. There are three types of Impeachment by Prior Conviction (Defendant's Testimony): Collateral Impeachment, Direct Impeachment, and Impeachment of Character. Collateral Impeachment is the introduction of evidence of a prior conviction to show that the defendant is not credible. Direct Impeachment involves using the prior conviction to challenge the truthfulness of the defendant's testimony. Lastly, Impeachment of Character involves introducing evidence of the defendant's prior convictions to prove that the defendant has a history of immoral behavior and thus is not worthy of belief.