This toolkit is designed to help communities prevent deportations by keeping local police separate from immigration enforcement. The essential link between police and ICE is the ICE hold request, also known as an immigration detainer. On the basis of ICE hold requests, state and local police hold people in jail longer in order to hand them over to ICE. Without police departments willing to submit to ICE hold requests, ICE would not be able to apprehend and deport so many people. Even if Secure Communities, 287(g) and the Criminal Alien Program continue to operate, they are only as effective as ICE hold requests allow them to be. The hold request is what actually allows ICE to apprehend and deport people. Several communities have succeeded in enacting policies to stop submitting to ICE hold requests, and this toolkit is designed to help other communities establish similar policies.