India, Oct. 27 -- A 21-year-old woman, along with her ex-boyfriend, allegedly killed her live-in partner in Timarpur's Gandhi Vihar and tried to stage it as a fire incident using her knowledge of forensic methods, police said on Sunday, adding that it was revenge for taking obscene videos of her. The woman, her ex-boyfriend and another man have been arrested.

Around 2.50 AM on October 6, police said, a fire was reported on the fourth floor of the Gandhi Vihar room of the victim, a 32-year-old UPSC aspirant. Once the blaze was doused, a severely burnt body was found. The police had initially registered a case under provisions related to negligent conduct with fire, pending post-mortem and forensic analysis.

However, investigators soon gr...