Editing Fritz Haarmann (section)

===Hermann Koch===
In September 1918,<ref name="Monsters of Weimar p. 37"/> Haarmann is believed to have killed a 14-year-old named Hermann Koch, a youth who disappeared just weeks prior to his first confirmed victim, Friedel Rothe. Haarmann is known to have kept company with Koch. He is also known to have written a letter to Koch's school providing an explanation for the youth's prolonged absence.<ref name="Monsters of Weimar p. 101">Monsters of Weimar {{ISBN|1-897743-10-6}} p. 101</ref> As had been the case in the disappearance of Friedel Rothe, police had searched Haarmann's Cellerstraße apartment in search of the youth, although no trace of Koch was found and charges against Haarmann in relation to the disappearance were dropped. Koch's father had petitioned in 1921 for Haarmann to be tried for his son's murder however his requests were officially rejected.<ref name="Monsters of Weimar p. 101"/>