Where main evidence of prosecution fails, all corroborative evidence also fails

Considering the aforecited infirmities of the testimony of the prosecutions lone eyewitness, Agustin Tan, we are not satisfied that the constitutional presumption of innocence accorded to appellants has been overcome. Corollarily, we find it unnecessary to examine the other corroborative evidence presented by the prosecution. Where the principal and basic evidence upon which the prosecution rests its case fails, all evidence intended to support or corroborate it must likewise fail. [G.R. No. 119722. December 2, 1996]