C.I.D. - S1E101: The Invisible Killer - Part 1

What's the Story?

Promising scientist Ashok is found murdered inside his residence. Ashok was on the verge of a major breakthrough in his research just days before his death. He had informed his mentor, Professor Anand about this and was eager to share his findings. But unfortunately, he was killed on that day, just before he was supposed to meet Anand.