Varg Vikernes is a Norwegian musician and convicted murderer known for killing fellow black metal musician Øystein Aarseth in 1993. The case became widely known within both music and criminal circles. Vikernes was convicted and sentenced to prison, serving a lengthy sentence before being released. His case remains controversial due to his ideological views and influence on black metal culture.

Anders Behring Breivik is a Norwegian domestic terrorist responsible for the 2011 attacks in Oslo and on the island of Utøya, the deadliest act of violence in Norway since World War II. His coordinated attack involved a car bombing followed by a mass shooting, resulting in 77 deaths. Breivik was arrested on the day of the attacks and later convicted of terrorism and mass murder. He received the maximum sentence under Norwegian law, with provisions allowing for indefinite extension based on continued risk.