Found on familysearch.org, but not on SA Registered Births. If found to be correct, there are an additional 6 children to him SA Reg Births.
Also appears in Biographical Index of South Australians 1836-1885 - residence Adelaide, Gawler and Pt Elliot.
Potential Transfer Record - The South Australian Advertiser, Tuesday 10 September 1861, page 3.
http://newspapers.nla.gov.au/ndp/del/article/877413?searchTerm=ockenden
Appointed Constable - The South Australian Advertiser, Friday 6 September 1867, page 2
http://newspapers.nla.gov.au/ndp/del/article/28800556?searchTerm=ockenden
TBD - Electronic newspaper record - Mounted Police - The South Australian... Friday 4 June 1869, page 3.
Arrest - The South Australian Advertiser Tuesday 22 November 1870, page 2.
http://newspapers.nla.gov.au/ndp/del/article/28596915?searchTerm=ockendenArrest - The South Australian Advertiser Tuesday 20 December 1870, page 2
http://newspapers.nla.gov.au/ndp/del/article/28597679?searchTerm=ockendenAssault - South Australian Register (Adelaide, SA : 1839-1900) Tuesday 9 January 1872 p 3
http://trove.nla.gov.au/ndp/del/article/39267124?searchTerm=ockendenArrest - TBD
The South Australian... Tuesday 11 February 1873, page 3. (search for Police trooper Ockenden)
Arrest Burnt Grass - South Australian Register (Adelaide, SA : 1839-1900) Tuesday 12 March 1872 p 3
http://trove.nla.gov.au/ndp/del/article/39261250?searchTerm=ockendenAppointed to Palmer - South Australian Register (Adelaide, SA : 1839-1900) Thursday 2 April 1874 p 6
http://trove.nla.gov.au/ndp/del/article/39818562?searchTerm=ockendenAppointment - The Advertiser Friday 24 January 1890, page 7
http://newspapers.nla.gov.au/ndp/del/article/24492403?searchTerm=ockendenGovt Appointment -The Advertiser Friday 17 January 1902, page 3.
http://newspapers.nla.gov.au/ndp/del/article/4889373?searchTerm=ockendenPosition Replaced Following Death - The Advertiser, Thursday 25 August 1904, page 6
http://newspapers.nla.gov.au/ndp/del/article/4999853?searchTerm=ockenden