Odpustení (2016)

It was not a silent night. Ales confronts his friend Jirí who rapes and kills a girl. Even though Ales tries to help Jirí to cover this crime, he can't escape from his guilt. Ales makes a decision to confess the truth but while doing so, he faces an unacceptable fact which won't allow him do so. As title states, the film is considering "forgiveness" as a christian doctrine. What's the precise conclusion we give to each crime and its punishment?