John Lynch (c. 1812 – 22 April 1842) was an Irish-born Australian serial killer who confessed to the killing of ten people between 1836 and 1842. He is possibly the most prolific individual serial killer in Australian history.Lynch arrived in Australia as a convict, assigned to a farm in the Berrima district. He murdered a fellow assigned convict in 1836 but was acquitted of the charge. After a period in a convict gang he absconded, and by July 1841 he had made his way back to the Berrima district. On two occasions Lynch murdered carriers along the road between Berrima and Camden, stealing their drays and teams. In the latter half of 1841 Lynch murdered the farmer John Mulligan and his family, and took possession of their farm in the Berrima district using the name John Dunleavy. He was co