"It’s been clear for a decade that the FBI works with ICE to keep informants in the country. What we didn’t know was that the assistance is often contingent and temporary, and that the FBI actively assists ICE in locating informants who are no longer useful so that they may be deported."
“'This creates a perverse incentive structure, because informants are incentivized to keep themselves valuable,' said [immigration expert and Stanford lecturer Diala] Shamas. 'It will further incentivize them to create investigations when there wouldn’t be one otherwise. In the traditional criminal context, the law enforcement community is conscious of the risk that coercing informants increases the likelihood of getting bad intelligence. But in the counterterrorism and intelligence context, this caution has been thrown out the window.'"
The article is by Trevor Aaronson, author of the Terror Factory: Inside the FBI's Manufactured War on Terrorism.