While Johns was serving his sentence, there was a rash of convict escapes and attempted escapes, but Johns remained well behaved. His good behaviour earned him a remission on his sentence, and he was released on a ticket of leave in February 1864. He then found work on Henry Martin's farm in Kelmscott. In January 1865, a steer named "Bright" belonging to William Wallace was killed, and Johns was accused of the deed. He was arrested on 29 March, found guilty on 5 July, and sentenced to ten years' penal servitude. Johns was to protest his innocence of this crime for the rest of his life. He was determined not to serve what he felt was an unjust sentence and, in early November, he and another prisoner absconded from a work party. They were on the run for nearly a month, during which time they committed a number of small robberies. It was during this time that Johns first adopted the nickname "Moondyne Joe". They were finally caught east of York by a party of policemen that included Tommy Windich, an Aboriginal tracker. For absconding and for being in possession of a firearm, Johns was sentenced to twelve months in irons, and transferred to Fremantle Prison.