The face of Charles Sobhraj, a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, is covered as he is transported to the airport after being released from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Navesh Chitrakar 

Nihita Biswas, who claims to be the wife of Charles Sobhraj, a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, walks outside the Department of Immigration as Sobhraj is taken inside after his release from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Monika Malla 

Nihita Biswas, who claims to be the wife of Charles Sobhraj, a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, walks outside the Department of Immigration as Sobhraj is taken inside after his release from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Monika Malla 

Nepalese police officers transport Charles Sobhraj (not seen), a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, in a vehicle as he is taken to the Department of Immigration after being released from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Navesh Chitrakar 

Police officers escort Charles Sobhraj, a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, to the Department of Immigration after he was released from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Chandra Bahadur Ale 

Police officers escort Charles Sobhraj, a French national known as 'The Serpent', suspected of killing over 20 Western backpackers across Asia, to the Department of Immigration after he was released from prison, following an order of Nepal's Supreme Court, in Kathmandu, Nepal December 23, 2022. REUTERS/Chandra Bahadur Ale 

A Nepal police personal stands guard at the entrance of Central Jail where Charles Sobhraj, a French national known as "the serpent" accused of killing over 20 young Western backpackers across Asia, is kept as Supreme Court has ordered his release in Kathmandu, Nepal December 22, 2022. REUTERS/Navesh Chitrakar 

A general view of Central Jail where Charles Sobhraj, a French national known as "the serpent" accused of killing over 20 young Western backpackers across Asia, is kept as Supreme Court has ordered his release in Kathmandu, Nepal December 22, 2022. REUTERS/Navesh Chitrakar 

Nepal police personnel stands guard at the entrance of Central Jail where Charles Sobhraj, a French national known as "the serpent" accused of killing over 20 young Western backpackers across Asia, is kept, as Supreme Court has ordered his release in Kathmandu, Nepal December 22, 2022. REUTERS/Navesh Chitrakar 

The original serpent's head of the Oseberg ship is placed in storage, in Oslo, Norway September 21, 2022. REUTERS/Victoria Klesty 

A necklace made of shells, found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A carved giant shell is displayed, found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Sonia Disciplina examines a bouquet of "well-preserved old flowers" inside inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez displays a pot shaped in the image of storm god Tlaloc, found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez displays jade jewelry, including ear spools and pendants, found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A worker designs a three-dimensional digital recreation of an artifact found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Daniel Bermejo picks out seeds found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Marks are visible on the roof of a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez were likely created after the tunnel was reentered in ancient times to remove a very heavy object and he believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez shines his cel phone light on a wall coated with iron pyrite powder inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Samples of preserved flowers and rope wait to be examined, found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Sonia Disciplina examines a bouquet of "well-preserved old flowers" inside inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Sonia Disciplina examines a bouquet of "well-preserved old flowers" inside inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Pieces of iron pyrite, including once-glittering beads as well as the bottom of a small cup are stored, which were found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A worker arranges pieces of objects found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Alejandro Soria restores artifacts found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez walks inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A worker arranges pieces of objects found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez holds a sample of thread which was found together with preserved bouquets of flowers inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez displays a jaguar skull found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez holds samples of seeds found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez shines the light of his cel phone on a carved amber sphere found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A preserved bouquet of flowers and rope wait to be examined inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Archaeologist Sergio Gomez gestures inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

Elisa Gomez Chavez restores artifacts found inside a 2,000-year-old tunnel built under the ornate Feathered Serpent Pyramid, which archaeologist Sergio Gomez believes recreated the underworld and was used to initiate new rulers among other religious rituals, in the ruins of Teotihuacan, in San Juan Teotihuacan, Mexico August 12, 2021. Picture taken August 12, 2021. REUTERS/Toya Sarno Jordan 

A vessel with a drawing of a snake is pictured on the bank of the Hanumante River during the final day of the month-long Swasthani Brata Katha festival in Bhaktapur, Nepal February 9, 2020. REUTERS/Navesh Chitrakar 

A snake is seen while a tract of the Amazon jungle burns as it is cleared by loggers and farmers in Porto Velho, Brazil August 24, 2019. REUTERS/Ueslei Marcelino 

A snake is seen while a tract of the Amazon jungle burns as it is cleared by loggers and farmers in Porto Velho, Brazil August 24, 2019. REUTERS/Ueslei Marcelino 

A snake is seen while a tract of the Amazon jungle burns as it is cleared by loggers and farmers in Porto Velho, Brazil August 24, 2019. REUTERS/Ueslei Marcelino 

A snake is seen while a tract of the Amazon jungle burns as it is cleared by loggers and farmers in Porto Velho, Brazil August 24, 2019. REUTERS/Ueslei Marcelino 

A white-lipped pit viper snake is seen at a fire station in Bangkok, Thailand, August 7, 2019. REUTERS/Soe Zeya Tun SEARCH "SNAKE CATCHER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

A Peruvian shaman carries a boa constrictor snake during a ritual of predictions for the new year at Pescadores beach in Chorrillos, Lima, Peru December 27, 2018. REUTERS/Mariana Bazo 

Archaeological artefacts in the shape of snakes are seen outside the tomb of Khufu-Imhat, at the Saqqara area near its necropolis, in Giza, Egypt November 10, 2018. REUTERS/Mohamed Abd El Ghany 

A cobra is seen during a show of Amier El Refaie at the Red Sea resort of Sharm El Sheikh, Egypt July 13, 2018. Picture taken July 13, 2018. REUTERS / Amr Abdallah Dalsh 

A voodoo box is seen during the presentation of confiscated stuffed wild animals and products used by shamans in Lima, Peru July 19, 2018. REUTERS/Guadalupe Pardo 

National Forest and Wildlife Service (SERFOR) and Peruvian police show confiscated wild stuffed animals and products used by shamans in Lima, Peru July 19, 2018. REUTERS/Guadalupe Pardo 

A snake charmer handles his snake on a street in Rawalpindi, Pakistan February 28, 2018. REUTERS/Caren Firouz 

A snake charmer handles his snake on a street in Rawalpindi, Pakistan February 28, 2018. REUTERS/Caren Firouz 

A mural with the axe and serpent logotype of ETA is displayed on a wall in Bermeo, Spain February 24, 2018. REUTERS/Vincent West 

A mural with the axe and serpent logotype of ETA is displayed on a wall in Bermeo, Spain February 24, 2018. REUTERS/Vincent West 

A sign is displayed at the entrance to the Tasting Room at Petersons Winery in the Hunter Valley, located north of Sydney in Australia, February 14, 2018. Picture taken February 14, 2018. REUTERS/David Gray 

A snake breeder holds a ball python in Assagay, South Africa, December 8, 2017. REUTERS/Rogan Ward 

A snake crawls along the flooded area at Saptari District, Nepal August 14, 2017. REUTERS/Navesh Chitrakar 

A man holds a snake, used to cover a wooden statue of Saint Domenico, during the St. Domenico procession in Cocullo, central Italy, May 1, 2017. Every year in May, snakes are placed onto the statue of St. Domenico and the statue is then carried in a procession around the town. REUTERS/Tony Gentile 

A snake covers a wooden statue of Saint Domenico during a procession in Cocullo, central Italy, May 1, 2017. Every year in May, snakes are placed onto the statue of St. Domenico and the statue is then carried in a procession around the town. REUTERS/Tony Gentile 

A man holds a snake, used to cover a wooden statue of Saint Domenico, during the St. Domenico procession in Cocullo, central Italy, May 1, 2017. Every year in May, snakes are placed onto the statue of St. Domenico and the statue is then carried in a procession around the town. REUTERS/Tony Gentile 

A woman holds a snake, used to cover a wooden statue of Saint Domenico, during the St. Domenico procession in Cocullo, central Italy, May 1, 2017. Every year in May, snakes are placed onto the statue of St. Domenico and the statue is then carried in a procession around the town. REUTERS/Tony Gentile 

A woman walks past a mural depicting the serpent and axe emblem of armed Basque separatists ETA, with "Bietan Jarrai" ("To continue both") written below, in the Basque port town of Bermeo, northern Spain March 20, 2017. REUTERS/Vincent West 

A snake charmer holds a cobra, which was caught in a house in a near-by village, in Jogi Dera (snake charmers settlement), in the village of Baghpur, in the central state of Uttar Pradesh, India November 9, 2016. Picture taken November 9, 2016. REUTERS/Adnan Abidi SEARCH "SNAKE CHARMERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A cobra is seen in Jogi Dera (snake charmers settlement), in the village of Baghpur, in the central state of Uttar Pradesh, India November 9, 2016. Picture taken November 9, 2016. REUTERS/Adnan Abidi SEARCH "SNAKE CHARMERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Snakes are seen inside a pot in Jogi Dera (snake charmers settlement), in the village of Baghpur, in the central state of Uttar Pradesh, India November 11, 2016. Picture taken November 11, 2016. REUTERS/Adnan Abidi SEARCH "SNAKE CHARMERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.