The methodology of an AP-KFF Health News investigation into medical neglect at ICE detention centers

KFF Health News and The Associated Press sifted through thousands of immigration habeas corpus claims to find allegations of medical neglect from people detained by U.S. Immigration and Customs Enforcement during the second Trump administration.

Without a comprehensive, publicly available dataset of medical complaints by those in ICE custody, we used immigration habeas corpus claims to identify detainees’ healthcare-related allegations raised in federal court. Although the intended purpose of habeas corpus is to challenge the legality of a petitioner’s detention — rather than conditions of their confinement — these filings sometimes include detainees’ claims of inadequate healthcare.

But habeas corpus filings are not always publicly available. Federal rules restrict how members of the public can access habeas petitions filed by people in immigration detention. For most of these cases, court websites publish only court orders and dockets describing other filings. The initial petitions are available only through in-person visits to federal courthouses across the country. Habeas Dockets, a project of the nonprofit Immigration Justice Transparency Initiative, coordinates a nationwide network of volunteers to gather these petitions and make them available online.

KFF Health News and AP analyzed the dockets of roughly 33,000 cases filed by detainees from Jan. 20, 2025, through March 2026. The vast majority of cases had only basic procedural information, like dates of court filings and rulings. Only about 4,400 included the original petitions.

We also gathered a few dozen case files from courthouses, lawyers and the Massachusetts federal district court website, which posts most petitions under a unique standing order.

We ran keyword and semantic searches of court records, including petitions, motions and orders, for terms and phrases potentially related to medical neglect, such as surgery, medications, inadequate medical care, and treatment for chronic conditions such as diabetes and high blood pressure.

We found about 500 cases potentially alleging medical neglect. At least two reporters reviewed each case manually, yielding more than 300 cases containing specific allegations in sworn filings of delayed, denied or deficient healthcare.

To be conservative, we excluded dozens of cases that alleged inadequate medical care but lacked specifics, for example a petitioner writing, “I have been sick and don’t get proper treatment,” or a judge noting a petitioner “complains that ICE is ignoring his medical problems.” We also excluded cases in which petitioners claimed only that they were denied special diets, exercise, or other accommodations that they said were key to managing their health conditions, such as a petitioner writing, “I suffer from Parkinson’s and cannot properly exercise,” or claiming that the food provided was unfit for a person with diabetes.

The cases we analyzed were neither randomly selected nor representative of immigration habeas filings nationwide. The claims were not independently verified. Many filings are not publicly available, and not all detainees raise medical concerns in court, so our account of cases represents a limited window into the landscape of claims, rather than a comprehensive picture.