Born in 1884, he started his writing career as a journalist, turning later to stories about a detective based on police officers he had met, Asbjørn Krag. He also wrote crime stories about detective Knut Gribb under the name Kristian F. Biller, a series character who was later carried on by other authors. He died in 1934. One of his novels, Jernvognen (The Iron Chariot) was adapted by Jason as a graphic novel in 2003.
This pseudonym of Sven Elvestad (who changed his birth name of Kristoffer Elvestad Svendsen in order to start fresh after being caught embezzling from his employer) was used as the name of Norway's most prestigious crime fiction prize, the Riverton Prize.