SYDNEY, Jan 17 - Maina, a 40-year-old school teacher, was shot dead by armed men riding a motorbike while walking near her Nairobi home in the suburb of Karen on October 19.

On Wednesday the ABC reported, citing court documents, that Mania accused her estranged husband Cyrus Bernard Maina Njuguna of psychological torture and had been granted a restraining order against him six months before her murder. 

In an affidavit to a Nairobi court in April 2017, Maina said her husband "became extremely violent and was of uncontrollable anger" following a move to Kenya from Australia with their two sons in 2016.

Njuguna, in an August affidavit, said he was not violent and his wife had been the one to grown distant and end the relationship after she had an affair.

Njuguna and his cousin John Njuguna Waithira, were arrested in relation to her murder, but released without charge on November 1.

Police continue to investigate her murder.

AAP