I was able to confirm that there was some number in that range, somewhere in the vicinity between 500,000 and 700,000 potential detainers that had been entered.
Detainers are often not signed by judges, and Cunningham says local police risk being sued if they arrest someone based only on an ICE civil warrant on the computer system.
As a result of his actions, the FBI put what's known as a federal detainer on Larry, which prevented him from being released from jail again, even if he was granted bond.