This class-action, civil-rights suit challenges egregious delays in the release of detained immigrant children to their families resulting from new policies and practices that subject parents and others to unwarranted fingerprint checks. Fingerprint-based background checks now add months to children’s detention, first as family members wait weeks for appointments to have their fingerprints taken and then weeks and even months longer for the results. These delays have caused the length of time that children spend in government custody to spike dramatically—in many cases, to more than double the previous average—and the total number of children in government custody to balloon to its highest in history.