As per case facts, a device parcel containing a grenade exploded, killing the addressee. Police found typewritten pieces from the wrapping, reconstructed the address, and an expert opined that the ... typescripts were from a specific commercial college's machine. The prosecution sought to examine this expert, but the defense objected, arguing that such expert evidence was inadmissible under S. 45 of the Indian Evidence Act, relying on a prior Supreme Court observation. The trial and High Court dismissed the prosecution's request. The question arose whether the opinion of a typewriting expert falls within the ambit of S. 45 of the Indian Evidence Act, given the rapid advancements in forensic science. Finally, the Supreme Court referred the matter to a larger Bench for a detailed examination, acknowledging the need for the law to adapt to modern scientific knowledge, especially since the previous relevant judgment on this point was by a three-judge bench.