First serial killer?

Kh. Asef Safa Kabir, Muhammadpur, Dhaka
It's unfortunate to see that Bangladesh has got its first serial killer. He has added a new dimension into the already extensive crime landscape of the country. I think the dramatic story of betrayal that this ruthless killer has portrayed as the motive behind his killing-spree must not be taken as a truth without conclusive evidence. It's quite possible that he made up this story that can be found in cheap Bangla movies in order to conceal his original motive. It's apparent from the descriptions and nature of the murders that all of these murders are nothing but horrendous sex-crimes. All of the victims were raped before they were murdered and I think nothing but nasty sexual motivation was behind these killings. This guy is not psychologically disordered. He is rather a sex-obsessed maniac, who slaughtered innocent girls after raping and torturing them mercilessly. Historically, sexually motivated killers (like Ted Bundy) were known as ordinary members of society until their gruesome crimes were exposed. I think the entire Rasu Khan case has explicitly underscored the vulnerability of marginal women in our country. The horrid face of this rapist cum killer can be regarded as an epitome of the sickness of our diseased society; a society where underprivileged women are still deprived of their dignity, social security and basic human rights. Often they are even stripped of their right to dream about a secured home, a dependable life-partner and a better future for themselves. Have we ever wondered how many serial killers we have who are skilled in killing budding dreams?