Nina Bernstein of the New York Times offers "Officials Hid Truth About Immigrant Deaths in Jail" (link):

Silence has long shrouded the men and women who die in the nation’s immigration jails. For years, they went uncounted and unnamed in the public record. Even in 2008, when The New York Times obtained and published a federal government list of such deaths, few facts were available about who these people were and how they died.

But behind the scenes, it is now clear, the deaths had already generated thousands of pages of government documents, including scathing investigative reports that were kept under wraps, and a trail of confidential memos and BlackBerry messages that show officials working to stymie outside inquiry...

...Brian P. Hale, a spokesman for Immigration and Customs Enforcement, said in an interview that the newly disclosed records represented the past, and that the agency’s new leaders were committed to transparency and greater oversight, including prompt public disclosure and investigation of every death, and more attention to detainee care in a better-managed system.

Those documents were obtained by the NYT in collaboration with the American Civil Liberties Union, and it's a good thing that they uncovered the documents. While the individual situations are definitely tragic and reforms need to be enacted, it also has to be pointed out that a major investor in the NYT is Mexican billionaire Carlos Slim, and the ACLU is directly collaborating with the Mexican government. Their goal - and the goal of many who will promote the NYT story - isn't simply to highlight government malfeasance in order to enact reforms. Their goal is to prevent as much immigration enforcement as possible.