
On the same day, July 4, 1941, the first six Jews from Jelgava were taken to the old shooting range by the Latvian Auxiliary Police, with the assistance of the Waffen-SS and the logistical help of the Wehrmacht. The Jews were ordered to dig several pits.
Four of them measured 60 x 3 meters, and another measured about 85 x 4 meters. After completing their task, these six Jews were shot by the German SD men.
Based on the interrogation protocols of the postwar Einsatzgruppen trials in West Germany, the executions were carried out in the course of several weeks in July 1941. The victims were shot at a rate of 300-500 per day.
Alfred Becu and his men ordered the Latvian auxiliary policemen to search for hidden Jews, going through their apartments in Jelgava. Usually, the Jews were taken in groups of 80-100. They were escorted to the shooting range, either on foot or in trucks, by the Latvian Auxiliary Police, and occasionally by the Waffen-SS. Upon reaching the execution site, the Jews were forced to enter a bunker next to the pits. Meanwhile the Latvian auxiliary policemen secured the surrounding area and encircled it. Police Sergeant Wilhelm Adelt commanded the German Police and SD, as well as the shooting range itself. Usually, the Jews would be taken out of the bunker in groups of five and forced to kneel or stand, facing a pit. Two German policemen were assigned to killing every Jew. They were equipped with 98k carbines and rifles. One policeman would aim at the victim's heart, while the other would target the back of their head. This was done to ensure that the victim died.
Once Wilhelm Adelt had given the order to shoot, the soldiers would fire their guns, and the Jewish victims would fall into the pit. After the shooting was over, the pit was covered with earth by the Latvian policemen.
The executions stopped sometime around July 29, 1941. According to the local newspapers, the number of citizens had been reduced by about 4000.