His critics alleged him already before this of overseeing manipulation attempts by his focus persons. For instance, the criminal marshal of Herbert Schäfer of the Land Office of Criminal Investigation in Bremen effected a confession of the focus person. Bender had seen the haunting issue "Heinrich Scholz" as authentic in 1965. The focus person, who was a trainee in a china store back then did not only manipulated deliberately in the store, but also during the screening in his laboratory. Bender's assistants countered with expertise that at least some of the manipulations should not have occurred.