Polish state prosecutors have set an ambitious goal for themselves: to find surviving Nazi SS soldiers who committed war crimes at German concentration camps during the Second World War and to bring them to trial.

"We finally have to deal comprehensively with the mass murder that was committed in German concentration camps," State Prosecutor Robert Janicki, of the Institute of National Remembrance (IPN) in Warsaw, told DW. "It is a state prosecutor's duty to find perpetrators and bring them to justice, and we want to see if it is still possible to find Nazi war criminals today."

The institute, which studies the history of Poland under German and Soviet rule, has set in motion hundreds of cases against Nazi war criminals. Most have to do with mass executions and the pacification of Polish villages during the German occupation from 1939 to 1945, as well as crimes against the civilian population during the 1944 Warsaw Uprising.

Looking for specific individuals

The nine most comprehensive investigations have to do with the mass murder of Polish citizens in German concentration camps between the years 1939 and 1945. The cases involve the camps Auschwitz-Birkenau, Ravensbrück, Majdanek-Lublin, Buchenwald, Mauthausen, Sachsenhausen, Dachau, Mittelbau-Dora and Gross-Rosen.

The IPN's investigations include crimes committed against civilians during the Warsaw Uprising

"We are not randomly looking for people who may have committed crimes," said Janicki. "We are looking for specific individuals. We have evidence against them and have exact information as to their names and what their roles were at the camps."

A working group of state prosecutors and historians has compiled a list of 23,000 SS concentration camp functionaries, from which 1,600 names have been selected. They are men who were in their 20s at the time, who have never been punished for their suspected crimes and whose names and professions before the war are known to authorities. Polish investigators hope that this very specific information will allow them to locate the accused.

Poland's government has submitted 400 requests for assistance to international law enforcement agency Interpol, with another 1,200 set to follow soon. Ten cases have already been reviewed. Replies from Germany and Austria have come back negative: The wanted persons, they said, were no longer alive or their whereabouts unknown.

No statute of limitations

Janicki believes that most of the former SS men would be living in Germany if they are still alive. Should any be found there, Poland would issue a European arrest warrant and turn to Germany for help in extraditing them. But not all of the accused are Germans, others are from Austria, Ukraine, Belarus and Latvia.

Former Treblinka guard Demjanjuk was found guilty of being an accessory to mass murder

Poland has been prosecuting Nazi war crimes for decades. A number of investigations were launched after the end of the Second World War, but most were shut down in the 1960s and 70s due to a lack of willingness to cooperate on the part of West Germany. Only a fraction of Nazi war criminals living in what was then West Germany were ever brought to trial, let alone convicted.

But in 2011, Ivan "John" Demjanjuk, at former guard at the Treblinka Nazi death camp, was found guilty of being an accessory to mass murder. It was the first time that a German court had ever handed down a conviction for accessory to murder in a concentration camp without having to prove an individual crime.

Since then, a number of cases have been reopened in Germany. Some have even resulted in convictions, like that of Oscar Gröning, the 96-year-old "accountant of Auschwitz."

Polish state prosecutors hope this shift in German jurisprudence will help them in their quest to prosecute war crimes — an offense for which, like crimes against humanity or genocide, the country has no statue of limitations.

In all, the IPN is investigating roughly 350 cases related to German crimes committed during the course of the Second World War. Janicki believes that Interpol's involvement in the international search for surviving SS men will help to "finally bring these events of war to an end."