In August 1840, Tolmer was part of the punitive expedition to the Coorong after Aborigines massacred 25 shipwreck survivors from the ship Maria, which had been travelling from Port Adelaide to Hobart.
Police Inspector Alexander Tolmer was among the original residents of the newly established village of Norwood, South Australia, in 1847.
[6] In November 1853, following an inquiry into police morale and efficiency, Tolmer was demoted to Chief Inspector (he ascribed the blame to Stuart, his temporary replacement while on Gold Escort duty), and six months later was sidelined to the Public Service.
[10] Despite Alexander Tolmer's alleged character flaws and involvement in various disputes, there cannot be much doubt that his initiative and determination in relation to the implementation of the overland Gold Escort helped save South Australia from an economic crisis at a most vulnerable time in the colony's development.
He was energetic in his pursuit of law and order in the young colony over a long period and as Police Commissioner implemented significant reform and innovation to the service.