Given that more than 9,000 innocent Italian civilians, many of them women and children, died in Nazi massacres during the dreadful last 18 months of the second world war, it is amazing how few of the perpetrators have been brought to justice. Only five members of the German occupying forces were ever imprisoned in Italy for war crimes; and with the death last week, aged 100, of Erich Priebke, the former SS captain who in 1944 helped organise the execution of 335 men and boys at the Ardeatine Caves south of Rome, none of them is now still alive.