one of most notable suspected instigators of the massacre was wilhelm mohnke, then commander of the 5th company of the 2nd battalion of "leibstandarte". mohnke's involvement was not brought to trial in the immediate aftermath of the war, and when british parliament mp jeff rooker (labour party) attempted to lead an investigation into the massacre in 1989, the (west) german prosecution found the evidence against mohnke insufficient. the investigations by british and german parties with assistance by british survivors and german ss veterans highly suggest that mohnke was indeed responsible for giving or at least passing the order to execute the prisoners. the operations on 28 may 1940 were amended at 23:15, just before midnight, with a renewed directive from corps leadership, "korpsbefehl nr. 15".