can also be restricting local police responses, restricting them from honoring all immigration deta n detainers. we'll talk a lot more about detainers, but i need to give a little background here. for our purposes, an immigration detainer is a tool used by the department of homeland security and i.c.e. specifically when they identify deportable people who are held in jails or prisons. a detainer is a request by i.c.e. asking law enforcement officials to hold that individual for a period of up to 48 hours longer than they would have usually held that person. so after bail has been posted, after the charges have been dropped, or after the person has served out their sentence, to hold that person an additional amount of time so that i.c.e. can assume custody. these daetainers are not judicil warrants and compliance with the detainers is voluntary. i said cities with sanctuary policies do cooperate with the federal government on immigration. and they do this in a variety of ways. even in any sanctuary jurisdiction, officials send federal immigration agents the fingerprints of any person, including