Return of Reckoning

Sure, just wasn't sure if it's a bug.

Hi, I play mostly the PVE and on my way clearing the Order quests in Troll Country I run on a quest given in the Felde Castle to kill Konrad Schultz. The quest is given by Konrad himself who is flagged as friendly lvl 13. How can I kill him to get my greedy hands on a witch hunter journal which is ...