The Malmedy massacre was a war crime in which 84 American prisoners of war were murdered by their German captors during World War II. The massacre was committed on December 17, 1944, by members of Kampfgruppe Peiper (part of the 1st SS Panzer Division), a German combat unit, during the Battle of the Bulge.
Peiper also executed his own wounded and exhausted stragglers who couldn't keep up with the main group when they were forced to retreat .
also the Le Paradis massacre
Committed by members of the 14th Company, SS Division Totenkopf, under the command of Hauptsturmführer Fritz Knöchlein. It took place on 27 May 1940, .
Soldiers of the 2nd Battalion, the Royal Norfolk Regiment, had become isolated from their regiment. They occupied and defended a farmhouse against an attack by Waffen-SS forces in the village of Le Paradis. After running out of ammunition, the defenders surrendered to the German troops. The Germans led them across the road to a wall, and machine-gunned them. Ninety-seven British troops died.
Don't forget the infamous Wormhoudt Massacre
After their surrender, soldiers from the 2nd Battalion Royal Warwickshire Regiment, the Cheshire Regiment, and Royal Artillery as well as French soldiers in charge of a military depot were taken to a barn near Wormhout and Esquelbecq on 28 May 1940. When there were nearly 100 men inside, up to 12 soldiers from the 1st SS Division Leibstandarte SS Adolf Hitler, threw stick-grenades into the building killing many POWs. Two groups of five survivors were taken outside and shot in the back as the grenades had failed to kill everyone.
A total of 80 men were killed, 15 men were eventually found by a regular German Army unit. Their wounds were treated before they were sent to prisoner of war camps in occupied Europe.
SS again, I think I can see a pattern here.