On 5 June 1975, four carabinieri officers, in one car, drove up a winding road to an isolated farmhouse above Acqui Terme in northern Italy. We still don’t know if it was a routine search or if they had received a tip-off. While the driver was parking the car, the other three walked towards the main building. There were two cars parked outside. The carabinieri knocked on the door, a man opened it and a woman appeared at a window above. Moments later, the man at the door threw a hand grenade. One of the carabinieri, Umberto Rocca, lost an eye and an arm. What happened next has been the subject of controversy ever since.




