Boere, who is on the Simon Wiesenthal Center’s list of most wanted war crime suspects, went on trial in October in the western city of Aachen charged with the 1944 killings.
“His lawyer read a statement to the court which acknowledged he had shot dead the three civilians,” said a spokesman for the Aachen court.
He also said he was acting upon orders and that at the time, he had viewed this kind of behaviour as part of a war situation,” added the spokesman.
Boere was captured by US forces in the Netherlands after the war and confessed to killing the three Dutch civilians when he was a member of an SS squad targeting anti-Nazi resistance fighters.
Boere escaped and fled to Germany before being sentenced to death in absentia in the Netherlands in 1949. After refusing a 1980 Dutch extradition request, a German court indicted him in April 2008.
German media have reported that Boere and other members of the squad shot dead a chemist in his shop in the Dutch town of Breda, as well as a bicycle seller and another man in Voorschoten in the southern Netherlands.
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