Charles Sobhraj is an infamous French serial killer and con artist who has been active since the 1970s. He is believed to have committed numerous murders across India, Thailand, and Nepal, and is known for his cunning ability to evade capture. He has been convicted of multiple counts of murder
From Wikipedia
Charles Sobhraj is a French serial killer, fraudster, and thief whose victims were mainly Western tourists travelling on the hippie trail of South Asia during the 1970s. He is of Sindhi and Vietnamese origin. He was known as the Bikini Killer because of the attire of several of his victims, as well as the Splitting Killer and the Serpent for "his snake-like ability to avoid detection by authorities".