U.S. President Donald Trump waves as he tours a section of new U.S.-Mexico border wall built in San Luis, Arizona, U.S., June 23, 2020 Carlos Barria/Reuters President Donald Trump falsely claimed that only immigrants with "the lowest IQ" return for their court dates when released after being arrested by US immigration authorities. Trump's comments during Thursday's presidential debate referenced a policy often called "catch and release," where migrants are released from DHS custody pending their immigration court proceedings — which his administration ended in 2018. The DOJ says around 44% don't show up, and researchers say that rate is likely much lower, and no evidence suggests that migrants' IQ plays a role in their likeliness to appear in court. Trump also falsely claimed that migrant children his administration separated from their parents at the border were "so well looked after." Visit Business Insider's homepage for more stories. During Thursday's presidential debate, President Donald Trump falsely claimed that, of the migrants arrested by US immigration authorities who are released from custody pending their court proceedings, only those "with the lowest IQ" show up for their immigration hearings."Less than 1% of the people come back.