At Ovčara , according to later witness testimonies , a man named Kemo took Nicollier from the hangars , at which point Nicollier was viciously beaten , and killed by a gunshot to the head by one Spasoje Petković , who then took 20 francs from his pocket . Nicollier 's remains were among sixty not subsequently found . It is possible that they were initially disposed of in shallow graves , which caused them to be uncovered by the following spring and then thrown elsewhere , or that they were thrown into the Danube
Ovčara
Vukovar massacre
Jean-Michel Nicolier