KINGSTON, Ont. - The day before a Montreal man was charged with killing his three daughters and one of his two wives, he was caught on a wiretap saying that even if he is hoisted onto the gallows, nothing is more important than his honour.

Mohammad Shafia, 58, his wife Tooba Mohammad Yahya, 41, and their son, Hamed Mohammad Shafia, 20, are each charged with four counts of first-degree murder.

Three teenage Shafia sisters, Zainab, 19, Sahar, 17, and Geeti, 13, along with Rona Amir Mohammad, 50, were found dead inside a car submerged in the Rideau Canal in June 2009.

A jury in their murder trial in Kingston, Ont., is listening to wiretaps that police recorded in the days leading up to their July 2009 arrests.

Shafia can be heard saying "even if they hoist us onto the gallows ... we have not done anything bad."

He is heard comparing his daughters to prostitutes for having boyfriends, saying they were treacherous, and that nothing is more valuable to him than his honour.