This article examines the use of battered woman syndrome (BWS) expert testimonies in Canadian case law, regarding cases involving murder or attempted murder of abusive partners by women in violent intimate relationships. The purpose of this article is to contribute to literature about the use of BWS evidence in Canadian jurisprudence with connections to social work. The author provides a historical overview of the use of BWS testimonies in Canada and presents case examples. The article explores the benefits of BWS testimonies, its limitations, recommendations for reformulating its use, and implications for social work practice.