Twenty-eight female guards were unfairly dismissed by a security company because the client‚ Metrora.
The wife of a Limpopo policeman appeared in the Seshego magistrates' court with two other people yesterday in connection with the officer's death.
Anna Mochaki appeared with Frank Mochaki, a relative of her late husband, and a traditional healer, Matome Mahlatji.
The three were each granted bail of R1000 and they will appear in court again on April 20.
Inspector Joshua Mochaki, 52, who was attached to Polokwane police station, died mysteriously on December 31 after complaining of pains in his stomach.
According to provincial police spokesman Captain Mamphaswa Seabi, Mahlatji, 65, and Mochaki, 42, allegedly helped Anna Mochaki to kill her husband.
It is believed Anna Mochaki had approached Mahlatji to obtain poison to kill her husband.
Seabi said the dead policeman reportedly ate poisoned food at his home. Results of an autopsy had revealed that the deceased was killed by poison.
"After the autopsy results revealed poisonous substances, we immediately launched an investigation into Mochaki's death," said Seabi.
The three suspects were arrested on Saturday after a lengthy investigation.
Mahlatji was arrested at his home in Modjadjiskloof and Frank Mochaki, a teacher at a school in GaRamphele village, was arrested in Moletjie.
Seabi said Anna Mochaki was also charged with defeating the ends of justice for failing to report to the police when she saw her husband vomiting before his death.
She also allegedly cleaned the crime scene to destroy evidence.
"We had initially opened an inquest docket, but after the arrest of the suspects, we charged them with murder," Seabi said.