© 2017, Springer Science+Business Media B.V. The Spanish criminal justice system has a specific Law for Gender Violence (1/2004). This article addresses what happens when a law with a feminist perspective is implemented in a predominantly patriarchal institution. The main aim of this paper is to approach women’s experiences in the Spanish criminal justice system, analysed as a technology of power producing women’s subjectivities, and focusing on their agency. We used a qualitative methodology with participant observation (24 sessions) and in-depth interviews with professionals working with gender violence (17) and women who reported gender violence by their heterosexual partner (11 individual and 1 group). We analysed data with the qualitative analysis software Atlas.ti. The results focus on subjective processes and agency among reporting violence, the expedited trial, protection and restraining orders, and probation.