Yes, British citizen Richard Huckle was a convicted pedophile who abused children in Southeast Asia. He did not directly kill any of the children he abused. However, he was found guilty of a large number of child sexual offenses committed between 2006 and 2014.
Huckle posed as a volunteer and English teacher in impoverished communities in Malaysia and other parts of Southeast Asia to gain access to vulnerable children. He used his position of trust to exploit and sexually abuse them. His crimes came to light when he was arrested in 2014 at Gatwick Airport in the United Kingdom after he returned from one of his trips to Malaysia.
In June 2016, Richard Huckle was sentenced to 22 life sentences by a UK court for 71 offenses related to child sexual abuse. These offenses involved 23 children, and the abuse ranged from rape to the production and distribution of indecent images of children. Huckle's case drew significant attention due to the heinous nature and scale of his crimes.