Another foreign national has died in a US immigration jail. Thirty-four-year-old Hiu Lui Ng of China died one week ago today after nearly a year in custody. He had been stricken with cancer that had gone undiagnosed and untreated. Ng was married to a US citizen and the father of two American-born sons. He was jailed last summer at his final interview for a green card. Attorneys for his family are demanding a criminal investigation into his detention and death. They say guards routinely ignored his complaints of back pain and even physically abused him to get him to accept deportation.