Continued from page 1

Though Mr. Kunz was due to testify in the Demjanjuk case, he backed down after learning he was under investigation himself.

Among other ongoing cases, prosecutors are still investigating another Ukrainian, Alex Nagorny, who testified in the Demjanjuk trial. They are currently trying to determine whether he is the same person as a Nagorny implicated by witnesses as a guard who participated in the killings at Treblinka.