The policemen, whose names had been withheld, were filmed on a cellphone driving past a mob justice scene in Majemantsho village near Mafikeng where Boikie Molefe, 34, was being attacked.
Molefe had allegedly stabbed his ex-lover Motlalepula Matlala to death, before being caught and stoned to death.
The New Age reported that a preliminary internal investigation found that the officers should be charged with contravening regulation 20 of the Police Disciplinary Act, which was a dismissable offence.
A report on the matter was given to provincial commissioner Lt-Gen Zukiswa Mbombo on Wednesday.
It found the two officers had failed to protect the victim and prevent the attack.
North West police spokesman Lesego Metsi confirmed the findings and said Mbombo would study the report. – Sapa