He was from S S waffen in the armoured formation that took part in battle of bulge in the final stages of WW II.it was a decisive battle most fiercely fought . Jochim Peiper , SS lt Col was the commanding officer of the Waffen regiment that formed the leading formation of the panzer corps. At malmedy during the battle , Eighty US soldiers who Surrendered from a artillery reconnaissance battalion were gunned down by peipers unit while few escaped.There has been some confusion about the incident. It was claimed that the prisoners tried to escape and fired from their dropped guns and waffen SS soldiers had to retaliate. After the war , the allies arrested the members of the unit and they were tried for war crimes at Dachau camp by Us military tribunal and he was one of the accused in a group of 74 members and he was sentenced to death . his trial number was 59.This trial became very controversial and highest courts of USA got involved including International court and all death sentences were commuted to life term and lesser prison terms.