"19. So is the case with the criticism levelled by the High Court on the prosecution case finding fault therewith for non-examination of independent witnesses. It is true that if a material witness, which would unfold the genesis of the incident or an essential part of the prosecution case, not convincingly brought to fore otherwise, or where there is gap or infirmity in the prosecution case which could have been supplied or made good by examining a witness which though available is not examined, the prosecution case can be termed as suffering from a deficiency and withholding of such a material witness would oblige the Court to draw an adverse inference against the prosecution by holding that if the witness would have been examined it would not have supported the prosecution case. On the other hand if already overwhelming evidence is available and examination of other witnesses would only be a repetition or duplication of the evidence already adduced, non-examination of such other witnesses may not be material. In such a case the Court ought to scrutinize the worth of the evidence adduced. The court of facts must ask itself - whether in the facts and circumstances of the case, it was necessary to examine such other witness, and if so, whether such witness was available to be examined and yet was being withheld from the court. If the answer be positive then only a question of drawing an adverse inference may arise. If the witnesses already examined are reliable and the testimony coning from their mouth is unimpeachable the Court can safely act upon it uninfluenced by the factum of non-examination of other witnesses. In the present case we find that there are at least 5 witnesses whose presence at