John Dunn was convicted at the Parramatta Court of Criminal Jurisdiction of murdering Mary Rowe, largely on the testimony of a sixteen year old accomplice, John Welch, whose evidence also saw Welch’s father, Thomas Welch, convicted as an accessory after the fact.
Dunn was due to hang at Parramatta two days beforehand, on Monday 16 September 1811, but as the execution was about to proceed the boy, John Welch, suddenly retracted everything he had sworn at trial. He declared Dunn innocent and claimed that he and his father were the true killers. The Acting Provost Marshal, unable to consult anyone and acting on what observers called motives of humanity, respited the hanging on the spot.
The reprieve lasted only two days. Dunn was finally executed at Parramatta on the Wednesday following, as near as possible to the site of the murder itself, amid what one witness described as far gloomier circumstances than the original sentence would have produced.
After he was cut down, Dunn’s body was delivered to the medical officer at Parramatta General Hospital, where it was dissected and anatomised before burial. The scaffold retraction left lingering public doubt over Dunn’s guilt, with contemporary accounts noting the boy’s claim that Dunn was innocent and that he and his father were the real perpetrators.
