India, Oct. 28 -- The discovery of obscene videos on a hard disk, of over 15 women, has revealed the dark secret that sparked one of Delhi's most disturbing murders this year. Police say a 21-year-old forensic science student from Moradabad killed her 32-year-old partner, a UPSC aspirant, after learning that he had secretly recorded intimate videos of her and refused to delete them.

What began as a relationship of trust spiralled into a cycle of betrayal and rage, ending in a murder that investigators say was planned with chilling precision. The woman allegedly drew on her background in forensic science and her fascination with crime shows to stage the killing as an accident and destroy evidence.

According to police, the woman enlisted ...