Gauteng Police Commissioner Mzwandile Petros said on Tuesday the discovery of Frances Rasuge's remains was not an accident, but the result of police reacting to new information.
On Tuesday, police confirmed DNA tests proved the remains found in the garden of a Temba home in Hammanskraal last week were those of the police constable.
She went missing in 2004.
Rasuge’s boyfriend, William Nkuna, is serving a life sentence for her murder.
He was sentenced in the Mmabatho Circuit Court to life imprisonment, even though her body was never found.
On Tuesday, Petros and Gauteng Premier Nomvula Mokonyane paid their respects to the Rasuge family.
Petros said police investigators knew the location of the body as early as January.
Construction workers had uncovered the remains while digging for a trench.
The commissioner said a community member had come forward with information, which detectives followed up on.
He apologised to the Rasuge family after they found out of the DNA results through the media.
Mokonyane said Rasuge will be laid to rest after the Easter weekend.
(Edited by Zethu Zulu)