The Trump administration likely separated thousands more children from their parents at the U.S.-Mexico border than previously reported. That’s the conclusion of the inspector general of the Department of Health and Human Services, which said in a report Thursday that efforts to track those children have been so spotty that the exact number of family separations is unknown. Last summer, a federal judge ordered the Trump administration to reunite families separated by Trump’s “zero tolerance” policy along the southern border; but the inspector general’s report makes clear that many migrant families weren’t identified and reunited as part of the judge’s order.