Details about police collaboration with immigration authorities are now available. A comprehensive list has been compiled, focusing on arrests made by police departments. This list was built using numerous requests for records.

Further information on this topic can be found through the work of Koby Levin and Adam Rayes. They have provided insight into the process of tracking police collaboration with immigration enforcement.

For a full understanding of the findings, it is best to consult the original source, which offers a detailed explanation of the methods used to gather this information.