This is an important question pertaining to Amitabh Bachchan's Don released in 1978.?

In the original DON(1978), when ACP Desilva conducted a raid that night and was killed, then Vijay was arrested by Insp Gen Malik as he was thought to be the real DON. Vijay tried his best to prove his innocence, but fails as all the concrete evidences & witnesses desert him. However, there was one witness who could have easily proved that the person arrested as DON was actually Vijay, but Vijay never bothered to ask Desilva about him nor did it strike the late ACP that the witness of this person could most easily prove Vijay's innocence. NOW, you people tell me who was this witness ?