Nohorn was a member of Renfri's gang of bandits.
Following Renfri to Blaviken
Nohorn is among several men to follow Renfri into Blaviken in search of the wizard Stregobor. They cross paths with renown witcher Geralt of Rivia and pick a fight, one that is stopped before it can begin by Renfri.
Much later, Nohorn and the rest of Renfri's gang block Geralt's path to Renfri, massing on the message that he has to choose the "lesser evil." Geralt draws his sword and takes out Renfri's gang, one by one until there is no one left alive.