On April 9, 1922, lead Reingruber wanted to question Adolf Gump in connection with the murders as it had been rumoured he was in a relationship with Viktoria. However, no evidence was ever found to prove this claim.[citation needed] With three others, Adolf Gump had participated in the murder of nine peasants in Silesia. Reingruber could not rule out Adolf Gump's potential involvement in the murders at Hinterkaifeck, and he instructed the corresponding gendarmerie stations to ask for an alibi for the last few days in March 1922.[citation needed]