Laszlo Csatari "died on Saturday morning. He had been treated for medical issues for some time but contracted pneumonia, from which he died," his lawyer Gabor Horvath told AFP on Monday.
Csatari was alleged to have been a senior police officer actively involved in the deportations from the Jewish ghetto in Kassa, now known as Kosice in present-day Slovakia, during World War II.
After being sentenced to death in absentia by a Czechoslovakian court in 1948 he made it to Canada where he lived and worked as an art dealer before being stripped of his citizenship in the 1990s.
He was placed under house arrest in July 2012 and in June prosecutors charged him. They said that as commander of a collection and deportation camp in the Kassa ghetto he was "actively involved in and assisted the deportations" in 1944.
Csatari, also known as Csatary, "regularly beat the interned Jews with his bare hands and whipped them with a dog-whip," prosecutors said.
The case was suspended on July 8 on grounds of double jeopardy, since Csatari has already been convicted of the charges presented, but last week a higher court ordered that proceedings resume.
Slovakia meanwhile had commuted the 1948 death sentence to life imprisonment and authorities there issued a subpoena for him to attend a hearing last month, but he failed to show up.
