Berlin ? The world’s third most-wanted Nazi suspect, who lived undisturbed for decades after World War II, has been charged in Germany with participating in the murder of 430,000 Jews while serving as a low-ranking guard at a death camp.

Samuel Kunz, 88, had long been ignored by the German justice system, partly because of a lack of interest in going after relatively minor Nazi figures. But in the past 10 years, a younger generation of prosecutors has sought to bring all surviving suspects to justice.

Authorities recently stumbled over Kunz’s case as they were studying old documents from German post-wars trials about an SS training camp named Trawniki. The papers were being reviewed in connection with the trial of John Demjanjuk, the 90-year-old retired autoworker on trial in Munich for allegedly serving as a guard at the infamous Sobibor camp.

Kunz was named the No. 3 suspect in April by the Simon Wiesenthal Center. He ranked fairly low in the Nazi hierarchy, but he was among the most-wanted suspects because of the large number of Jews he is accused of helping to kill.

Kunz had been living quietly at his home near the western city of Bonn. He received a letter last week saying he had been charged with three different cases of participating in the murder of Jews, authorities said.