In Spain, the Reviewable Permanent Prison is the harshest sentence that criminals can face. What crimes are punished with this penalty? What murderers do it? Juan Carlos Quer and Miguel Lorente, with two very different points of view, question whether it is a fair and effective punishment.

Gender violence and domestic violence can start with excessive control of the couple, with discriminatory treatment and go to the extreme of ending in murder. How does this escalation of violence occur? What signs are common in most cases?

The murder of Desireé Leal, that of César Juanatey or that of Ruth and José Bretón are the reflection of one of the most ruthless crimes that can be committed: the murder of one's own children. How can parents come to take the life of their children?

Throughout history there are many criminals who have justified their actions by alluding to the presence of the Evil One in themselves or in the victims. Mental alienation or strategy to avoid a certain sentence?

The robbery of the Virgen del Cristal, a unique jewel in the world, or the Solitaire robberies are examples of how criminals sometimes become criminals in order to get hold of loot.

On the one hand, the benefits of the internet as a tool for researchers, on the other, the internet used as a hook or, practically, as a murder weapon. This is how new crimes are committed: behind the mask of the Internet.