The "Bikini Killer" is a nickname given to Charles Sobhraj, a notorious criminal known for his involvement in a series of murders during the 1970s. He primarily targeted young backpackers traveling through Southeast Asia, luring them with charm before committing his crimes. Sobhraj was eventually arrested in India and is known for his ability to escape from prison multiple times. Sobhraj's criminal activities included theft, drug trafficking, and murder, leading to his conviction for several killings. His life inspired various books and films, highlighting his manipulative nature and the international manhunt that followed him. He remains a controversial figure in criminal history.