The South African detective ridiculed for his slipshod handling of the initial investigation into the killing of Oscar Pistorius' girlfriend has resigned from the force.
Warrant Officer Hilton Botha, a detective with 24 years' experience, was the first officer on the scene after the 14 February shooting of law graduate and model Reeva Steenkamp.
However, he was pulled off the case after it emerged he was being investigated for seven counts of attempted murder.
He was also criticised for mixing up key facts about the investigation at Mr Pistorius' bail hearing.
Mr Botha is accused of firing on a minibus taxi full of passengers in 2011 while pursuing a man accused of murdering a woman and disposing of her dismembered body down a drain, local media said.
The charges were withdrawn but reinstated on 4 February.
The incident has embarrassed the South African police who regularly come under fire for failing to reduce one of the highest crimes rates in the world and dispel perceptions of a force that is poorly trained.
Last week, eight policemen were arrested for tying a Mozambican taxi driver to the back of a vehicle and dragging him to the station.
The video-recorded treatment of the man who later died was seen around the world.