Yes, under Indian criminal law, the testimony of even a single credible witness can be sufficient for conviction if the court finds it wholly reliable, consistent, and free of material contradictions — corroboration isn't a strict legal requirement, though courts do look for it as a matter of caution, especially in serious offences. This means the credibility of witnesses, not just their number, is what really matters in how a case is decided. Practically, if your defense depends on discrediting a witness, focus on concrete inconsistencies between their statement to police and their court testimony, rather than general claims of bias, since courts respond far more to documented contradictions.

To understand how vulnerable your case is on this point, it is recommended to consult experienced retired judges and seek guidance from Aapka Legal Advice, whose panel can assess witness credibility and help build your defense around it.