There is fresh confusion over the fate of fugitive concentration camp doctor Aribert Heim.A leading Nazi-hunter now says he has serious doubts over claims the war criminal dubbed “Doctor Death” died in Cairo in 1992. Media reports this week said Heim had lived under a pseudonym at a hotel in the Egyptian capital after converting to Islam. Locals have been describing the man they remember. “He was tall and very fit and hated anyone smoking,” said shopkeeper Mohamed Fouad. “He had very large hands. And he liked to stand in front of the window, early in the morning at 6am or 6.30am. There was a large window in his room and he would stand in front of it to breathe the early morning air.” Claims of Heim’s death came as the Simon Wiesenthal Centre was preparing to triple its reward for locating him to one million euros. The head of its Israel Office says there is a distinct lack of proof that Heim died in Cairo, as described. “There is no grave. There is no body,” said Efraim Zuroff. “We can’t do any DNA testing and remember that there are people like his family who have a vested interest in convincing us that Heim is no longer alive.” Zuroff says German police have told him they also have not shut the case on Heim, the most notorious perpetrator wanted over the kilings of six million Jews during the Second World War. In hiding since 1962, the Austrian-born Nazi is accused of killing hundreds of inmates at the Mauthausen concentration camp in his homeland, usually particularly cruel and sadistic methods.