CORROBORATIVE EVIDENCE:

     The presentation of an informant is not a requisite in a prosecution for drug cases. The failure of the prosecution to present the informant does not vitiate its cause as the latter’s testimony is not indispensible to a successful prosecution for drug-pushing, since his testimony would be merely corroborative of and cumulative with that of the poseur-buyer who was presented in court and who testified on the facts and circumstances of the sale and delivery of the prohibited drug.  Failure of the prosecution to produce the informant in court is of no moment, especially when he is not even the best witness to establish the fact that the buy-bust operation has indeed been conducted. (People vs. Gonzaga, G.R. No. 184952, October 11, 2010, Del Castillo, J.).