He died and was entombed in ice.
It was first believed that Otzi died from the winter storm, or he may have been a victim of a ritual sacrifice. It was not until 2001 that X-rays and CT scans showed Otzi had an arrowhead lodged in his left shoulder when he died matching a small tear on his coat. Therefore Otzi died of blood loss, would probably have been fatal even if modern medical techniques were available at the time. Further research found that the arrow had been removed before death, causing bruises and cuts to the hands, wrists and chest.
PathologyAt the time of his death he was 1.65 metres (5 ft 5 in) tall, weighed about 61 kilograms (135 lbs) and was about 45 years old. When his body was found it weighed 13.750 kilograms (30 lbs). Pollen, dust grains and isotopic composition of his tooth enamel showed he spent his childhood ear the village of Feldthurns. Analysis of his intentional contents showed two meals, one of chamois meat and the other of red deer both with herd bread. He was infested with whipworm (intentional parasite). During CT scans it showed three or four of his right ribs were cracked probably either because of assualt or more likely centuries of ice had crushed his body. Otzi had a total of 61 tattoos, consisting of 19 groups of black lines.
Lorenzi, R. (2011, September 19). The Ice Mummy: Little-Known Facts : DNews. Retrieved March 20, 2016, from http://news.discovery.com/history/archaeology/iceman-discovery-110919.htm