He declared martial law to halt riots. His armed forces began an orgy of reprisals that led to the killing or executing of 608 persons, the flogging of 600, and the burning of 1000 dwellings. He also executed a colonial member of the Assembly not actually involved in the rebellion, who had opposed him politically. He turned Jamaica into a colony, and in the final days of the legislature prior to it becoming a colony, he passed an Act of Indemnity that exonerated him and others involved in the reprisals.
He was denounced as a murderer and a monster of cruelty in England, and was relieved of his governorship and recalled to England, where proceedings for murder, assault and false imprisonment were brought against him three times. All were dismissed on technicalities (e.g. conflict in the application of international law). He died of old age in England on a government pension.
He is one of Australia's well-known and important explorers.