The book “Prisoners; voices of men in confinement” collects stories written by seventeen men deprived of liberty in the former public jail of La Chorrera, in Panama. Each story is a testimony of the crime and the confinement in which the author narrates in first person what happened to make his story public, ask for forgiveness and send a message of prevention to young people. In this article is conducted a gender analysis of the stories based on the concept of "masculinity mandate", by the anthropologist Rita Segato, which allows observing criminal behaviors, beyond gender violence, linked to the fact of being socially men. Greed, power, domination, violence and control of women appear recurrently in their testimonies, configuring what could be called a “criminal masculinity” (or a masculinity that can be criminal), especially in contexts where it is combined with marginalization and poverty, questioning male power. The man as a victim of the mandate of masculinity, according Segato's thesis, is embodied in the penalty paid by those deprived of liberty, prisoners of the criminal mandate.