The German man from the western district of Borken, North Rhine-Westphalia state, served as a guard from June 1942 to September 1944 at the Stutthof camp near what was then Danzig, now Gdansk in Poland.

He was not publicly named but German media identified him as Johann R., a retired landscape architect and divorced father of three.

Dressed in a wool suit with a green hat, he entered the regional court of Münster in a wheelchair, with a walking stick in hand, facing charges of being an accessory to the murders of several hundred camp prisoners.

These included more than 100 Polish prisoners gassed in June 1944 and “probably several hundred” Jews killed from August to December 1944 as part of the Nazis' so-called “Final Solution”.

Initially composed, there were unbelievable scenes when the defendant started weeping as the court heard written testimony from Holocaust survivors who now live in the United States or Israel, read out by their lawyers.

Marga Griesbach recalled, according to DPA, how she saw her six-year-old brother for the last time in the camp before he was sent to Auschwitz where he died in the gas chambers.

Another survivor and co-plaintiff, a woman from the US state of Indianapolis, charged that the defendant “helped to murder my beloved mother, whom I have missed my entire life”.

'Gassed, shot, left to die' 

Aged 18 to 20 at the time, and therefore now being tried under juvenile law, the defendant is “accused in his capacity as a guard of participating in the killing operations,” Dortmund prosecutor Andreas Brendel told AFP

“Many people were gassed, shot or left to die of hunger,” he added, stressing that the guards “knew about the killing methods”.

But when interrogated by police in August 2017, the accused insisted he knew nothing about the atrocities in the camp, Die Welt daily reported.

Asked why the camp detainees were so thin, he reportedly said that food was so scarce for everyone that, figuratively speaking, two soldiers could fit into one uniform.

Stutthof was set up in 1939 and would end up holding 110,000 detainees, 65,000 of whom perished, according to the Museum Stutthof.

Each court hearing will likely last for a maximum of two hours due to the defendant's advanced age — even though, prosecutor Brendel said, “mentally, he is still fit”.

The defendant was planning to make a statement during the course of the trial, his lawyer told DPA.

If found guilty, he faces a sentence of up to 15 years in prison — even though, given his age and the possibility of an appeal, he is considered unlikely to serve any time behind bars.

Brendel noted that German law has no statute of limitations on murder and pointed to the moral imperative to pursue the case.

“Germany owes it to the families and victims to prosecute these Nazi crimes even today,” he said.

“That is a legal and moral question.”

'No exceptions' 

Germany has been racing to put on trial surviving SS personnel, after the legal basis for prosecuting former Nazis changed in 2011 with the landmark conviction of former death camp guard John Demjanjuk.

He was sentenced not for any atrocities he committed, but on the basis that he was a cog in the Nazi killing machine by serving at the Sobibor camp in occupied Poland.

German courts subsequently convicted Oskar Gröning, an accountant at Auschwitz, and Reinhold Hanning, a former SS guard at the same camp, for mass murder.

However both men, convicted at age 94, died before they could be imprisoned.

Prosecutors have also filed charges against another former SS guard at Stutthof, a 93-year-old from the city of Wuppertal. It remains to be determined if he is fit to stand trial.

Historian Peter Schöttler  highlighted “an important humanitarian and legal reason” to push on with the justice process, stressing that “the rule of law should not allow for exceptions”.

Griesbach, in her testimony, said that “I don't harbour hatred or rage in my heart”.

Rather, she said her main concern was remembrance of the crimes at a time when Holocaust deniers are being heard again, including in her country the United States.