A so-called honour-killing expert is expected to testify Monday at the canal deaths trial in Kingston, Ont.
Shahrzad Mojab is a University of Toronto professor.
Mohammad Shafia, 58, an Afghan businessman, his wife Tooba Yahya, 41, and their son Hamed, 20, are accused of killing four female family members. All of them have pleaded not guilty to four counts each of first-degree murder.
In 2009, three Shafia sisters, Sahar, 17, Zainab, 19, and Geeti, 13, along with Mohammed Shafia's first wife, Rona Amir Mohammad, 52, were found dead in a submerged black Nissan Sentra in a canal just outside Kingston.
The Crown alleges the four women were killed because Sahar and Zainab Shafia were thought to have dishonoured the family by having boyfriends and living a modern lifestyle.
PHOTOS FROM THE SHAFIA TRIAL: