Abubakar Awudu Suraj had been in Japan for over two decades when immigration authorities detained him in May 2009. The Ghanaian was told in Yokohama of his deportation to Ghana at 9:15 a.m. on March 22 last year. Six hours later he was dead, allegedly after being excessively restrained by guards.

Jimmy Mubenga also died last year while being held down by three private security guards before takeoff on a British Airways flight from London to Angola. The father of five had lost his appeal to stay in the U.K. and was being deported. Mubenga put up a struggle and died after the guards sat on him for 10 minutes, say witnesses.

But the details of the deportations of two men from rich countries back to their native Africa, and their aftermath, are strikingly different. Mubenga's death is already the subject of a vigorous police inquiry, front-page stories and an investigation by The Guardian newspaper. The case has been discussed in Parliament, where security minister Baroness Neville-Jones called it "extraordinarily regrettable."