Jagomastas was an activist for the rights of the Lithuanian minority in East Prussia and a publisher. He and his wife, two sons and daughter were shot at Ponar outside Vilnius in August of 1941. On the 75th anniversary of his death the Center for the Study of the Genocide and Resistance of Residents of Lithuania is calling on the public to remember him and the murder of his family. An event is scheduled for 12 noon on August 23 at the marked grave of Jagomastas in Ponar.
More information in Lithuanian here.