79-year-old Charles Sobhraj, "The Serpent" serial killer, is released from Nepalese prison, subject of Channel 4 documentary "The Real Serpent: Investigating a Serial Killer."

79-year-old Charles Sobhraj, known as "The Serpent," is a freed French serial killer who allegedly murdered at least 20 Western backpackers on Asia's "hippie trail" during the 1970s and 1980s. He is now a regular visitor to the UK, where he was filmed for a Channel 4 documentary titled "The Real Serpent: Investigating a Serial Killer." The documentary follows Sobhraj's release from a Nepalese prison in 2022 after nearly 20 years behind bars and confronts him with evidence of his guilt.