Justice Martin Muya ruled that the two are guilty of misusing of their firearms which led to the death of the innocent girl.
Muya says Inspector Veronica Gitahi and Constable Issa Mzee misused their pistol and an AK-47 rifle when they conducted the reckless operation.
Their Sh500,000 bonds have been cancelled and they were remanded at the Port Police Station awaiting sentencing on Friday.
Muya noted that police did not conduct surveillance when they undertook the operation in search of a wanted murder suspect whom they claimed was hiding in the house where Mwandaza was.
Muya said the suspect was not in the house as alleged by the two officers who were leading the operation.
The judge termed the operation as botched and the officers were not equipped with proper night vision gadgets before they stormed the house.
Mwandaza was shot dead on August 21, 2014 during the operation in which eight officers stormed her family’s home in Mwaweu village, Kinango.
An autopsy report indicates that she was shot twice – in head and chest – leading to her death.